I have one of clives crossmembers also and am fitting it myself next spring,, been sitting in my garage for last 2 years.
last time i spoke to him on phone he was no longer trading and wasnt wanting to do crossmembers anymore as he made no money from it..

id be interested ho hear if that has changed as i would gladly let him fit it for me but i doubt that will be the case
if you was desperate i could photograph it and note the dimensions for you to get a copy made up
keith