It seems that the 800W motors are currently out of stock everywhere. This appears to be because the miniature railways community, which also uses a lot of Bosch 750s, have just cottoned on to them as a Bosch 750 replacement and have started buying them in large numbers (by large I mean the shop I bought mine from had a stock of just 10). I spoke to one of the train designers who uses them and his advice was to ring Red Circles motorcycles and pre-order them. They're currently restocking from china so hopefully will get them back in UK stock soon.