Check this out:
http://www.toyeast.com/proddetail2.asp?pdtid=AC0298
I have also seen just the charger plate (if that is the part you broke) there too. Looks to be out of stock right now. You may want to check e-bay as that is were I found out that Toyeast was selling just a charger base.
I also have one of the controllers you seek. Not goning to part it out for $5 -shipping. The Toyeast controller linked above is cheaper than your offer of $15.