As I surmised, Bills workshops are under 3" of floodwater at the moment, which is why things have been slow on the kits, but he is coming over to my house next week to take the original kit off my car for measuring and jig making purposes, so once that is done, things should start moving. He is still saying that he thinks kits will be available in around 4 -6 weeks time.
It will be really easy to fit, for anyone with a bit of spanner aptitude, or any half way to reasonable workshop will be able to do it, as well as setting it up once installed, but I will ask him to make some useful notes whilst he is preparing things, which should help.
I'll keep people informed as things progress, or don't hesitate to contact him directly.