I've got a simple home made one that I welded up in an hour.
Piece of 10 mm flat bar, 2 holes drilled to go over wheel studs then tighten up with wheel nuts.
Then a solid round bar about 13 mm dia and about 75 cm long and the end welded in the middle of the flat bar at 90 degrees.
Last is a 2 foot length of solid round bar about 50 mm diameter.
Drill a 15 mm hole in the middle of this across the diameter of the bar.
Fit over the end of the 13 mm round bar so the 50 mm bar basically becomes a T handle slide hammer and finally weld a large nut on the end of the 13 mm round bar to act as a stop for the slide hammer.
Make sure your welds are good or you'll wear the slide hammer.
Works best with 2 people using the slide.Made from scrap steel I had laying around and has taken out a few stubborn axles no problems.
You could slot the flat bar/wheel stud holes to make it a more universal fit slide hammer for other makes.
Hope this helps,
Terry.