Dual rear caliper spindles

Hey everyone,
So I want to go dual rear calipers on my build. I know that Keisler can make his rear drop spindles with the extra tabs for the second set of calipers, but they are a bit pricey. I also know that ZerekFab does the modification to stock spindles for this purpose as well, but for what you get, I think the price is a bit high. I know each has had R&D and setup costs and all and I've taken that all into consideration with both kits.

Just looking to see if anyone knows of another company that sells a full spindle or someone else that modifies them for dual caliper mounts that might be a little lower priced.

Thanks