Guy, you move fast!Oh Calumet in the UK has the strap it looks like
http://www.calumetphoto.co.uk/item/339-100R/
I just popped out, got back and you've solved the problem for me. I also have the RRS L bracket on the Phase camera so the Calumet strap should work just fine for me.
Once again thanks for your help. Appreciated.