Zuk88 from my club took an old brake drum, cut it down in size then welded a metal shaft about 2' long to it. Then he put a sledgehammer head on the tube. Since the bar was smaller then the inside mount on the sledgehammer it could slide back and forth easily. Then welded a stopper on the end. Instant slide hammer for pulling axles. Just remove your drum, slip this one one and tighten it in place. Then pound away until the axle comes out.
I just bought a generic slide hammer setup from Napa on sale. I'm not creative...