I don't think it's possible to buy these balls any more. I got mine two years ago and it was difficult to find then. Here's the listing on Amazon where I got mine, which gives the name of the manufacturer:
http://www.amazon.com/Play-Visions-Mirr ... B009YLWWJIQuote:
is he friendly or are they feisty like P'lets
POWs are considered to be a mellow species like cockatiels. They usually coexist peacefully with tiels, which is why I felt fairly safe getting this species. In fact he's been courting the cockatiel hens, who seem to think it's sexual harassment lol.
He's a bit bigger than the tiels and his movements are lively, so they're a little intimidated by him. But there's been no threats or violence at all. POWs are mostly considered to be an aviary bird, without a whole lot of pet quality. But I think his pet quality is excellent.