There is one in garden, on the back side of zoo. Opposite meezan bank. Have heard he does very good welding but charges almost double the normal price. I took the complete Exhaust system and he asked for 4k to do 7 or 8 Welds (500/weld). My father in law gets Exhaust work done from this guy (don't know his name, but he has long beard) .
I bought the system from bukhari silencer on thr back side of Japan plaza