Ski: Your characters will have been assumed to have gone on a mission or two in the past few months which will have resulted in the Empire now knowing of your survival and status in working for the Rebellion; which in turn means you (like ALL the PCs

) are on Bounty Hunter's 'Most Wanted' lists.....consider yourself honored!

As for the details of those missions, I leave them up to you, WITHIN reason....
Jedi: Yes; the Equipment Repair skill would cover repair and modifications to Armor; but as I have no idea what MFTAS or the Mandalorian stuff you mention is (Please remember, I am NOT basing anything on Wookipedia or other 'canon' Star Wars stuff as necessarily REAL in my game version of Star Wars); basically the rules I have for Armor are as listed in my House Rules/Modifications thread:
Full Body Armor: +1D to STR but -1D to DEX
Armor Vests: +2 to STR; -1 to DEX
Armor Clothing: +1 to STR; no penalty to DEX
You could certainly change the color/style enough to make the armor not recognizable as Stormtrooper armor and add things like bandoleers/pouches or even small compartments easy enough; more elaborate mods could include Jet-Packs or built in Blaster weapons, etc.; and you could 'downgrade' the armor to the Vest status.....but there's no way to get rid of the penalty for Full Body Armor; sorry.
As for the Helmet and electronics; sure, you could either jury-rig it to take out the electronics and put them into a different helmet if you like; but it would be pretty obvious that the Imperials would have changed out their codes and such so that just having access to some of their comms wouldn't be of any real value in that sense.
So, please feel free to have armor modified to the degree mentioned above (i.e. not a jack-pack; but you could certainly have the bandoleer/coloration changes and possible downgrading if you so desire) and a Helmet with the Imperial communications equipment in; which pretty much just translates to having a hands-free comlink.
Everyone: I plan on putting up the initial threads for the next Adventure; "Domain of Evil" today/tonight and tomorrow.....please be aware that there will also be a new OOC thread coming up soon as well; probably to be titled "OOC 2"; as Tonixx tells me that once the thread gets to about 30 pages; it needs to stop and we've just about reached that over the past couple of years!
Final thought: For those of you who weren't here for some of the earlier modules; many of the 1st Edition Star Wars modules from West End Games had several 'offscreen cut-away' scenes sprinkled throughout the adventure; usually to show you what some villains were doing 'off camera'; which obviously your characters would have no knowledge of; but it was thought to be part of the fun of re-creating 'Star Wars movie-style' adventures. In the past, I asked if players wanted these scenes to be posted or not....the earlier crew always voted "YES" and I'm happy to do that again; but I thought I would throw that out there for you relative new-comers (note: Shantipole did NOT have such cut-away scenes in the module).....YES you would like to have them posted; or NO you would not.
Along the same vein; pretty much all of the early modules started with an 'Adventure Script' that was supposed to be read outloud by the players and GM at the first session to 'Start the module off'; and I will be posting that as well....with generic "PC 1"; "PC 2"; etc. listed.....you guys can fill out who's saying what in your imaginations!
I hope everyone is doing well and I'm looking forward to the new adventure!