If it's a problem you can build your own BEC using a single IC like a 'simple switcher' by national semi.
http://www.national.com/images/pf/LM2678/10088603.pdf
http://www.national.com/pf/LM/LM2678.html
Works up to 40V, supplies 5A, and very efficient, won't heat up like a linear regulator.
Parts cost $10. or less.