Ballast wheel weights for LS R3039

[HandyDanny]

Looking for rear wheel weights for R3039. My wheels have 3 holes at 9.5" between them on-center. Can't find any used weights matching this. (Don't know why LS has a 3-pattern - used 4 hole weights seem to be in plentiful supply. Checked the wheels on a NH Boomer 35 thinking they'd be the same as the LS's, but they're a 4 hole pattern.)

Any thoughts where i could find used weights, other than Craigslist and eBay, matching my pattern, or how to adapt 4 hole weights to my 3 hole pattern? Thanks