Marvel-Schleber (Help needed)

[Craig Todd]

I'm in the process of overhauling my O320 carburetor. The model is a MA- 4SPA and the lycoming part number is 10-5009 on the carburetor.
I have been onto the Aircraft Spruce sight, and located the correct codes to get an overall kit and new steel floats, however, i need to replace the two piece venturi with a single piece venturi. My old part number on the two piece venturi is 46-A33, this part number does not correspond with any of the part numbers on Aircraft Spruce's web sight for replacement one piece venturi. I have e-mailed Aircraft Spruce on two occassions and have not received a response from them. Is their a fellow RVator out there, who has a contact at Spruce to treat my enquiry with interest, or resides close to one of the Spruce stores to go and see these guy's and locate the correct code that i can place my web order. Any help or advise would really be appreciated.