I know, I know, the auto trans are terrible but it's what the heart wants

and from what I've read they can be kept alive if looked after correctly, sadly when i got my car it already had 110K and hadn't been treated kindly.
So I'm looking for an auto transmission to fit my 5th gen UKDM 2.2 Vtec.
Preferably one that isn't on the verge of death as mine is would be nice
I'm based in Essex, UK.