If you don't find what you need with that source, try vintage British car parts suppliers (Moss Motors, Victoria British come to mind). The early B16 carbs are very similar if not identical to those fitted to similar vintage British stuff (A-H Sprite/MGA stuff) with all them silly pinch seals and banjo fittings and the like under the float bowls and jets.

You probably ought to gitcha some whitworth wrenches while you're at it.. All the carb fittings on my Jag are whitworth, and may well be on yourr too.

Have fun!
-Matt