http://www.realwheel.net/products.php?catid=19

Found these gents in Iowa, they are making me a set of 12X10 .125 wheels with Aircraft 6061 Aluminum 4/156mm bolt pattern and .250 center web, they make these for Sprint Cars, ATV's etc...get this they are on sale for $81.99 a piece...Fullerton Sales them for $170 apiece of course they are .190 inside and .125 outside. I'm going to give these a try they run them on the 1000 lb Sprint Cars all the time. Real Wheel Rep said I would be fine in the sand as long as I don't get too much air....
They also said if they can get an order for 50 or more they will make any thickness we desire, I would like to have a set of .190 or .250 for my liking...Any Sponsors order 50 of these 12X10 4/156 .190 or .250 I'll take two each
These guys even make a 12X12 4/156 for you extremist!!!!!! Douglas has everything on backorder for two-three weeks they lost a big contract with polaris to China....