Hi Peter,
I purchased a kit from Great British Sportscars. The link is attached.
http://www.kitspares.co.uk/shop/item.php?product=5021
I found that the mount for the Alternator itself, did not work without some heavy modification. I ended up making one from scratch to solve this. The belt tensioner, pulley and belt, I am using though.
I hope this helps, and let me know if I can offer any more information.