I got mine made up by a local firm here in Bournemouth
http://www.threadandpipe.com/
The change over valve also came from them, but I've change that for an original now.
Any firm who makes up hoses and hydraulic fittings will do it. like 'Hypehose' I guess the fittings are all BSP as I don't remember changing anything when I fitted the original changeover valve. Ron