I had a similar eBay moment when the seller described his wheels as Astin wheels and didn't post a picture. I also needed adapters for my 5 bolt BMW hub. Dave at
http://www.orsonequipment.co.uk/ was very patient describing all he measurements he needed and is now making me some bespoke adapters.
There are pictures here of my wheels. Do the hubs and splines look similar to yours?
https://plus.google.com/photos/11566...521?banner=pwa