Does anyone have the Mercedes and Bosch reference number off the TVT 74 mm TB?

I looked at my stock TB this weekend and measured the opening at ~3" = 75 mm.......however it is narrower at the plate and looks like it could be machined down to the same size as the opening and fitted with a 74mm plate......

Maybe TVT can tell us whether he is selling a Mercedes TB (p/n would be helpful) or machining stock TBs?