Hello from Germany
I've also tried to start a group buy in the German Fiat forum "Cento-World".
After a great interest only a few peoples are left, so that the pricing was out of space. I enquiered from SFS (by the way, they wasted my sample

) and Viper-Performance. If you can find someone make the 4-way adapter, the kit will be possible but, from my point of view, even than there will be only a few people who will by it.
I made it with standart hose and couplers.