I did the same as Mark , £ 137 delivered for the uprated version from Dunning & Fairbanks in Leeds,
You tell them the length from diff flange to the gearbox oil seal & hey presto....3 days later it was in my Roadster
great service
As a comparison.....mine is 742mm in length, Ash G,s is 744mm ( his original prop before changing his engine )so in effect we,ve installed the gearbox / engine to within 2mm of eachother, not bad from working from the book plans
Thought I,d add that my install is a 1.8CVH & Type 9 box to a Sierra diff.
cheers
andy