The Heritage was the last one to have the handi-bulter,
I seem to remember something in my Heritage II manual about a handi-butler but have never seen a HII with one? Maybe someone else knows better?
Mike, check ebay.co.uk and I'm sure you will find a Tradition or Heritage with a handi-butler, there were quite a few last week with them.
The Classic Omega and Classic III are hard enough to get hold of over here, let alone with the handi-butler!
Good luck in your search
James