I need help with an exhaust
 

Been looking and i cant find a Y-Pipe for my 1988 rx-7 fc convertible and its really been bugging me. no shops around me can fabricate one and i dont want to spend a lot of money just for the one section. anyone have any suggestions?
I know of Racing beat but still dont know which one to choose.

Here is the RB one that replaces the stock one. It's the same size as a TII one but a littler larger diameter than the n/a. Y-Pipe Section for 86-92 RX-7 (All) - Racing Beat

Here's one from rockauto.More Information for DAVICO 429941 (rockauto.com)
1987 MAZDA RX-7 1.3L R2 Pipe / Resonator | RockAuto

I ran one for a bit with some Ebay mufflers. It would be ok on a non-turbo car but piping would be small for a turbo. Also though not crush bends the pipe diameter does get smaller in the bend areas of the Rockauto one.