I might be a bit confused. Are you looking to purchase a TQ or looking for someone to rebuild one? Maybe both?
I have 85+ TQ's in my garage (most are for parts) - that I will not use. All of these were purchased from eBay - so no knowledge about any of them other than they are should be great after a rebuild:
6322s – '73 C-body 440
6410s – '73 C-body 440 California (3x)
6518s – '74-77 pickup 440
6545s - '74-77 pickup 440 (2x)
6616s – '74 pickup 440 California
9022s – 74 pickup 360 automatic transmission
9023s – '74 C-body 440 automatic (2x)
9096s – '77-78 pickup 440 automatic (2x)
Any of the above are $30 (US) each (plus freight) and should be excellent choices.
9054s – '75 B/C-body 400
9055s – '76 A/B/C-body 360 automatic
9110s – '78 C-body 440 High Altitude and Lean Burn
9254s – '80 pickup 318
9342s – '82 pickup 318
This group are $20 (US) each (plus freight) and are good choices.
I have heard good things from one of our forum sponsors (right side column) Woodruff Carburetor Specialties.
I've rebuilt hundreds of TQ's as well.
BudW