you can get something like a single weber/solex siddraft manifold to suit from redline - they cost about 250 odd i think - just look up redline manifolds on the net - Suppliers in Sydney
Im running a 45mm weber on my 2t-B and its a very good setup - all bolt on and you can get the linkage kits to suit as well for about 80 dollars - once again - everything you need to get the fcarb running and hooked up comes in the kit