https://www.axialis.com/cursorworkshop/
is a good one for me
in the reaper resources folder IF you have a subfolder named
Cursors
whatever is in there will be used instead of the default reaper cursors
there is a sticky that WT made that gives you the names of the various cursors... so you make a .cur file and put it in the Cursors folder with the proper name and away ya go...