Adapter for shifter threading?

I have a shifter that was on a ca18 a couple years ago and I just picked up an s13 sr20 and it won’t fit. Do adapter kits exist to screw over the threading and make new threads? Right now the knob shifter is too big and just slides right overtop the sr shifter.

I wouldnt really care but I have a sick purple dildo shifter I wanna put on haha. Thanks peace.

best bet is to take it to a machine shop see if they can make something up for you. Or you can do it the ghetto way and just jb weld you shifter on to it…lol

hmmmmmmmmmm… kkkk.