you can try to make your own, or improvise with pvc pipes.. may even work... but nothing will solve your problem as well as a real set of beach wheels and cradles.

Cattrax are made to take a boat off the trailor... and easly moved around until ready to get wet... (i.e. so u can throw the sail on and get ready)

if cattrax were pointless, most serious sailors wouldn't throw out $500 a set