Hi Matthew.
Dont have a spare cabinet for you unfortunately.
The only sources I can think of are:
very kindly repairmen/shops keeping an eye out for a scrapper for you - put the word around your local repairmen......
OR
keeping your eyes peeled on ebay........
OR
passing the word round your local council tip and just hope that they would be willing to allow you to have/pay for a machine that comes their way.
Unfortunately the latter is nigh on impossible these days, with bollocky health and safety paranoia, or recycling edicts resulting in the answer generally being 'NO!.
Gone are the days, during the 1980s, where tips hived off reusable stuff - my local tip included. It had a warehouse which was opened on a saturday for the public to wander round and buy stuff.
I remember seeing a great condition Servis 310 there and my goldfish tank came from there.
Its all a case of keeping your eyes peeled and hoping for the best I am afraid.
Paul