need some help. I'm trying to find replacement screws/bolts for the inlet flange on a Turbosmart Wastegate. Was just told from Turbosmart support to go check my local hardware store, I'm a little hesitant to do that. Any suggestions where I can find the right screws for this thing. This wastegate came with the RevHard kit back in 04-05, 38mm with a 7lb spring. I have had these bolts back out on my 2-3 times a year, any thoughts on how to remedy that as well? I've tried locktite with no success.

Size : M8x35. Might be M8x25

Thanks guys!