^ I don't think that exists anymore. Even if they do, they won't carry out repairs. Only Luther used to do repairs at IMM, before they moved to Ginza Plaza, before finally settling down where they are now. Lol, how many years ago was that, man!
I'm from Jurong here as well, and i am pretty sure there are none in the area. Sound Alchemy would be the best bet. SBS buses 154, 157 and 174 from Boon Lay interchange all pass by that area. Check out streetdirectory.com and check out the road name and where to alight.
All the best!