In my random research, I stumbled upon a triple two bbl weber carb kit offered by Simon Auto in Germany. Simon Auto specializes in performance upgrades and parts for European performance cars, including the Alpine A310. The kit in question includes the carbs, a custom intake for the PRV and the linkage along with an air cleaner adapter plate.
It appears that this system is a custom designed and fabricated system not to be confused with the twin triple bbl Weber setup found on a handful of Pack GT Alpines and the Talbot Tagora.
I sent them an e-mail inquiry regarding the price and availability.
http://www.simon-auto-shop.com/shop/...ite=detail.htm