A few years ago you could purchase a small Beast dressed in his purple cape through WDW Merchandising for about $15.
They were sold in several shops on property at WDW that carried a display of plush figures.
I have not seen any around personally since 2005 or so, but you might find one on eBay or through other second-hand selling outlets.
He was about 8 to 10 inches tall and perfectly sized for small children, had no plastic eyes, and a velvety cape.
The Disney Store had a stunning detailed Beast released in the early 1990s for $50.
Elaborately dressed in his blue and gold ballroom attire, he was a large 18 to 20 inch plush.
You might find one of these on eBay, but probably not inexpensively.
Likely a collectors thing now.
The current eBay listings (just checked) show many Beast plush figures for under $20.
Have a look!
If that is not a option, my advice would be to contact WDWs Merchandise Department and ask them directly.
If you are visiting the Parks anytime soon, ask a Cast Member at one of the more plush-heavy shops (Emporium at MK, World of Disney at DTD ).
They can tell you if anything is currently availible.
Good luck !