Pool Buster is made by www.watertechcorp.com
They sell the parts on-line. They also sell the Blue Diamond robotic. It's a great cleaner but idiosyncratic: I have to take out my ladder before I run it and it once tried to eat the cord. You also cannot use it on odd-shaped pools without the remote, and then you must direct it (ugh!). But it works great on rectangular pools and is FAST!

I also have a Dolphin Remote control. This one, when it works, doesn't have a problem with the ladder, and it can handle multiple shapes easily, but takes 8 hours. It's the second one--I had SUCH problems with the first one the third season and raised SUCH a stink they gave me a new one.