https://www.ebay.com/itm/403981259935
Recently had good success modifying an early 90's wrangler axle actuator to serve as replacement for 4wd transfer case actuator for my son's '86 4 dr Eagle wagon.
Same diameter actuator shaft, but longer and no slot/hole. Used a cut-off wheel to shorten and slot then drilled a hole to match stock actuator end.
Jeep part has a hex head at actuator base, must be rounded to fit Eagle bracket on transfer case. If you have basic power tool skills you can make this work easily for less than $30.
Not sure where best to post this info, thought it might help someone. I just took a chance based on photos from internet before buying the more expensive custom part. Was an easy win.