Still clearing through my stuff and this is one of the last things I have that is cool aftermarket stuff. Up for sale is a set (4) of brand new bump stops and top hat bushings for a Tokico shock / FM Spring / FM sways setup. Granted, I assume could work for others and be far better than the OEM rubber bushings. I bought these at least five years ago from FatCat using the old worksheet they had on their site- I don't see anything like this for sale on their site any more- maybe you just have to call and talk to Shak. Stuff has been in storage for years, but condition is great, just a little dusty.
$80 + shipping.

If you're curious, I can see if I can figure out the thread pitch for the shoulder bolts.

For those unfamiliar: these are supposed to be used with NB top hats, that you supply, not included.

 

Sold.