i fitted one, its made by waeco.
www.waeco.com it cost me £97 brand new on ebay from autexworld int. trading.
a german company their email is
service@carhifiversand.com.i went for the basic model ms-50.
it works a treat keeps the car bang on the speed i set it at.
i did say on the old forum that when i find some time i will do a how to with pics etc, just haven't had time yet. if any of you get one before i do the how to then i would be happy to advise on where to fit the sensors, throtle cable, switches and vacume pipe etc