There an old ROH rim. Picked them up off ebay a little while ago.
Alloy centre with a steel rim. Not the lightest rim but seem very well made, strong and look nice.
The Simmons F90 wheel are very similar also. Which i believe are still available and very high quality.
 
Wheel size is 15x6j. Tyres are 195/50/15 Achilles 123r's.
 
15x8's won't really fit on a non bubble-arch mk1. Biggest I've seen is 15x7. And then you need to get the offset spot on. Ideally id like mine to have 10mm less offset, but they fit.. just.
I could also get 185/45/15 road tyres which would help give more room as well, but the car is sprung very stiffly so shouldn't pose too much of a problem. And i got these tyres from my mate for peanuts so will give them a go.