Maybe I'm just tired, but I have no idea what MTNA stands for. Please explain.
I don't have my files handy, so can't supply URLs. But you can google these folks easy enough.
For tomatoes specifically, I would consider:Tomatoes, Etc.
This is my friend Roger Postley's company. Roger grows as many as 100 varieties of heirlooms annually. No website, but you can reach him at RPostley@aol.com
, and he'll send you his seed list.Mariseeds.
Marianne Jone's company. She's been growing heirloom tomatoes for many years and selling both seed and plants. She has one of the largest seed selections in the industry.Tomato Grower's Supply Co.
One of the most reputable and service-oriented seed houses in the country. They also handle a small number of peppers and other veggies, but tomatoes are their mainstay.
For general seeds, try any of the following:Seed Savers Exchange.
SSE is the largest seed preservation organization in the world. You can join, and get the annual yearbook which lists thousands of varieties grown by memember. Or just get the SSE public catalog, which is like any other seed company except all the seeds come from the SSE collection.Southern Exposure Seed Exchange.
SESE had had some service problems in the past. But since Ira Wallace took over as manager they seem to have been resolved.Baker Creek Heirloom Seeds.
I'm including Baker Creek without a recommendation pro or con. Used to be one of the finest heirloom seed houses anywhere. But there's been a growing number of growers reporting dissatisfaction on various levels.Victory Seeds.
A great West Coast company. And speaking of tomatoes, the owner has been on a long term program to find and grow all the original Livingston varieties. Will the real Golden Queen please stand up. :D
There are numerous others. But if you get the catalogs from this handful you'll be well on your way to covering the heirlooms field....until you start collecting family heirlooms in the field; and then there's no hope for you.