I had a off the shelf 904 'Street Master' one and it worked fine for years. Outlived 2 904's behind 2 different engines.

At one point I did crack the snout (and broke the pump ears..prob because I was running a Cheeta manual RVB on the street ) and a local converter shop was able to fix it no problem.

I was asked to contribute money to help solve the civil unrest in Egypt, but I suspect it's some sort of pyramid scheme.