I saw your post on your 290 and I have a 029 that I upgraded with a 039 motor. I found a place, they have an Ebay site but will also sell away from Ebay. Look up See-Saws-Run on Ebay. Fast Shipping and really good prices. You can email or call them and inquire about parts. Email: rhatcher1658@gmail.com or phone number 660-988-0166 and good luck.
Andy
Andy