Okay, I know it's not Cherokee or Delaware language BUT:
Comanche Language Lessons on Cassette!
There is a new set of four lessons of the Comanche Lang. available!
The cost is $25, US shipping included. If you live in another country, you're gonna have to let me know who you are, and then I can find out how much the shipping would be to your country.
Anyways, here's the address to send your address and check to!!
COMANCHE LANGUAGE AND CULTURAL PRESERVATION COMMITTEE
ATTN: Mrs. Goodin
PO Box 3610
Lawton OK, 73502-3610