That is going to be one beautiful bike when you finish up, that gray cable housing can be a bear to find at a reasonable price. I watched for it until a listing for a complete set up of housing and Campagnolo inner cables came up, seller probably didn't realize what these usually sold at, and I managed to snag them with a BIN that was too much to pass up on.

There are some "close" replicas and aftermarket gray housings, I have some in use right now, but they aren't the same exact color and their diameter is just a slight bit smaller. Our LBS has a source for some of the vintage housing, in the correct diameter for those small diameter Masi and Medici top tube guides, I need to have him check for the correct gray.

Bill