My first choice would be a converter from DirtyD0g at TCCoA.
My second choice would be an Edge brand converter, specifically the Street Edge.
I have an Edge converter in my car @3000 stall, and it's great. I wasn't aware of DirtyD0g's converters before I got the Edge brand, but the differences between the two aren't worth me spending more money on another TC.
DirtyD0g's converter or Edge; you'll be satisfied with either one.