They can make you a stock-looking steel wheel with custom backspacing. I had made similar measurements on my '65 galaxie and ordered a set of 15x8 rims with 4.5" backspace--in bare steel I payed about $75 per wheel about 7 years ago. They look identical to my stock rims and fit my dog dish hubcaps. There is also a company called Stockton that makes custom steel wheels.
http://www.supermotors.net/vehicles/registry/9026
