Looking for Rebuild-able Rochester BV

[L6Ragtop]

My original BV may be beyond help.  The air horn is pretty warped and most of the sealing ridges between the air horn and bowl are non-existent which of course leads to a fair amount of leaking.  I was wondering if anyone had or knows where I can get a rebuild-able, complete carb for a 250 manual?  I don't trust the mass rebuilt units for fear of mix/matched pieces.

Thanks,
Dan