Are you blowing the fuse while raising the landing gear? Or, is the fuse blowing when the landing gear bottoms out when retracting. If it's the latter, it's a common problem. You can prevent blowing the fuse by not bottoming out the landing gear. Marking a line on the landing gear with a sharpie so you can stop before bottoming out sill solve that problem. I had the same issue with my 2011 Sundance.
If you are sure there is a problem with the motor or gear box, you can easily find a replacement. Just do an internet search for "Lippert landing gear motor".