I have a yellow 35th anniversary edition for sale. Although over your mileage. Remaped to over 330 bhp stock 300bhp revup engine.
http://www.autotrader.co.uk/classified/advert/201505153492677?atmobcid=soc3
To be honest I will have to do some research as I know they are rare. I have only seen smaller wheels for £1800. Although these are in need of a refurb
I will prob post them on here soon as I am selling the car and it might be better for me to take the wheels off first. Although I will need replacements as well