You probably won't find parts for it anymore. In fact, even with "hobby grade" boats, parts are only available for a few years and then it's discontinued. I'll use my wife's Aquacraft Atlantic tug as an example:

• I looked for it at a couple of hobby shop sites and found nothing.
• I tried to find it on the Aquacraft website. It's now Horizon Hobby and there's no mention of it
• I tried to find it at Amazon. They said it's unavailable
• I tried to find the Atlantic II on the Horizon website. It said the boat is discontinued and no mention of replacement parts being available.

This boat was purchased in 2013 and used only once, that being the following summer. Since the boat is now discontinued, the wife is not really willing to put it on the water due to the slight possibility of damage due to hitting something in the water or being hit by something