I first discoverred Terra Edibles   5 years ago and have been buying their seeds ever since. They have an online and a print catalogue which are well produced and easy to use.

Our
many varieties grown as certified organic are identified with a "CO"
beside their name in the catalogue. Although not all the seed we sell
is grown here or is certified organic, the seeds we offer are produced
organically, are open-pollinated, and are non-hybrid varieties which
means you can save your own seed for the next year’s planting.

cherry tomato
courtey flickr/ndrwfgg