Behind Al Saad Stadium. I do not have the phone number but the workshop is very easy to find and parking space is not a problem.

From Decoration R/A, take the turning towards Al Waab Junction.

Immediately after, take the right turn and follow the road through a mini R/A.

Continue on to the R/A at Al Saad Stadium and turn right, keeping the Stadium to your right.

Take the next turn on your right again keeping the Stadium to your right. The upholsters' is the first shop in the parade of shops to your left.