Fedco and some other companies carry good quantities of the red clover and buckwheat under "cover crops" section. The pink clover is technically red clover in the universe of garden catalogs.

Thanks ggg, I did drive to the nursery to check out the seeds - the packs indeed had a picture of a silly cartoon lady on the front speaking funny bits of wisdom. I didn't even pick them up to look at them.

Mostly, I was looking for the sweet pea seed that Renee's Garden offers. Last year I found the beautiful apricot zinnia seed from her, and they bloomed so well.