Anyone with a 24" DX want smaller cranks? give me a shout!
Or if anyone has 150mm 8 spline cranks for sale…
The DX is 10 splined, and I know this may not be what you are looking for but these fit on the DX:
http://www.unicycle.com/shopping/shopexd.asp?id=841
oops, yeah 10 spline. Those are nub-tastic… and $100. Thanks Brian.
Yeah. 
Good luck on your quest for finding some used.
I might be interested in a trade. I have a 24" dx and I think that shorter cranks might help a bit. Let me mull it over tonight and get back to you.
If they are in like new condition as mine are. I’ll swap ya…pm me.