I have had 2 sets of webers, one on my 427 Kirkham and the last on my 347 gt40. I made it a point to find the older Italian made carbs. The newer china made ones are definitly inferior but I believe they were made in spain before that to save on labor costs. I will keep my ears open for you.
Kirkham 427,aluminum with polished stripes
CAV GT40,302,Guardsman blue,white stripes
SPF Daytona coupe,Roush 427r