how can i fix the motor of my hotpoint aquarius 1000?

Arthur, two options mate!
1, go down the local tip and see if anyone has thrown your machine out, you might be able to salvage one from there for a couple of quid.
2, try these guys, but you'll need the model number of your machine, this is locate usually on the front panel behind the door.
http://www.domesticspares.co.uk/sub-all.asp?suball=Hotpoint&subcat=Washing%20Machines&userid=20059121412644

Mike
September 2005