I'm desperately looking to replace my engine (it's been running on 3 cylinders - surprisingly happily - and sounds like it'll be a huge and expensive job to fix)! I'm based in Cardiff but happy to cover the cost of postage if you're elsewhere in the UK. It does need to be a runner but I have a few bits (spark plugs, coil packs, air filter) and I can swap the turbo from mine. Someone suggested trying local breakers yards but I don't know how often Copens end up at them!
My preference has always been to fix an engine rather than replace with an unknown engine. Assuming no major block or head damage. Better the devil you know