I'm assuming you're talking about the McGaughy's stuff. Maybe McG or one of their distributors would sell them separately? Or, see if you can find someone that used them for the full 2" drop and would sell you their rings. All they are is plate steel, about 1/4" thick, cut into a donut shape. So, if you have a hook-up at a steel fab shop, machine shop or anyone with a plasma cutter, some rings could be made very easily and cheaply. Actually, if you need to have a different amount of drop on one side versus the other, you could use a thinner or thicker steel for the rings to fine-tune the drop. Pretty much all GM trucks are lower on the driver's side so this would be a way to level it. The general rule is that you will net twice the thickness of the spacer's thickness. This is why a 1" thick lift spacer for these rigs lifts 2". A 1/4" thick spacer ring for the strut cup will give you about 1/2" of lift. Or, in your case, you'd say 1/2" less drop to net 1.5" drop from the 2" strut cup drop. A ring made from 1/8" steel would lift it about 1/4", etc. You could have one of the McG rings milled down if that'd be a cheaper option than having some made from scratch.
