Thanks everyone for all the recommendations for shops with supplies in DFW! I so appreciate the spirit of camaraderie here. I ordered some linen online and was really pleased with it, but it failed to impress my mother who will be the recipient of my Mary.
My daughter and I went to visit Mom last week and stopped in at The Needlework Boutique just minutes from her house. Mom corralled Marlowe (my two-year-old) and I tried to take it all in. Mom selected some really lovely hand-dyed forest green linen and Suzette at Needlework Boutique helped me make sure there was enough for the finished sampler (of course Mom couldn't select something with the same count.)
Turns out Suzette is also working on a Mary. I hope we'll hear from her here.
My husband took my daughter out Saturday and I got started.
The Needlework Boutique is quite a drive from my house but I'm looking forward to future visits and with a built in babysitter minutes away it could be my new happy place.