Me and my son are fixing up a 79 f150 for his first vehicle. After seeing pics of my 70 f100 with old school slots he has fell in love with them. We would love to buy a set of 15x8.5 with around 3ish" of backspace. but would definately consider 8,9,or 10s or a combination of such depending on backspacing . If anyone has a set for sale please pm or email me size, backspacing , and price.
This is not what you have in mind, but might be another direction for consideration? [just in case you do not find the aluminum wheels] It is currently listed in the "For Sale" section. I'll provide a link.