The company I was going to buy from (hardcore parts) sold out so I bought some $45 off ebay. Hopefully I don't break the tires off and bust my diff case on the asphalt
I know others here that have used the wheel spacers that screw on the lugs and some had issues with them loosening up after a while. As long as you make sure they stay tight they should be fine.
We made them some years back. They work just fine if you install and leave them alone. Problem we saw was peeps would change tire/wheel combos for whatever reason and they would tend to back off the stud with lug nut after a few changes. Haven't made for some years now because they weren't big sellers.