David,
A quick look on ebay now & I see #'s 250160165593 & 260154656123, $30 to $40 will probably get either one, as mentioned above, get the right top. Buy a couple, they're cheap, & mix the parts to create what you want. I picked these, looks like you want an auto. choke, judging by your 3211 #. There's several good looking manual choke ones on there now too.
I can't imagine a $200 YF. I recently bought a 4700 series AFB, the old preferred model comp. series, for $40!
Doug
