Being patriotic is nice, but I'm going to be honest... If you limit yourself to USA made product you are going to be VERY limited in options of anything nowadays.
I love American products as much as the next guy, but I also know that not everything from China is bad and don't limit myself to just USA made products.
spindle-source on eBay makes the 8 lug spindles you need. They are 4.5" lift and are a direct copy of the old Fabtech spindles that used to be made that were discontinued.