carbeurator mix screw missing?

[AlexTF]

where can i buy just the air/fuel mix screw for my stock blaster carb? its missing for some reason and it wont run right without it.

 

[RIDE-RED350r]

If it's available at all, I would look at PJ Motorsports or JetsRus. Beyond that, eBay for a used one. If you can find an IPL for the carb, searching by OEM parts number should help