We have some at Linotype, but we do not license them directly through our webshop at Linotype.com

If you us e-mail info@linotype.com, the appropriate person should be able to discuss this with you.

http://www.barnamala.com/badda/fonthelp.html

http://www.omicronlab.com/avrokeyboard/bangla-fonts/

http://jeff.cs.mcgill.ca/~luc/bengali.html

note: I haven’t used any of these, so I cannot comment on their quality.
Tim

thanks folks.