I'm so glad that worked for you!
I don't remember how I stumbled across that website. It's deceptive because of its name, 123 Stitch. You might think it was only for needlework, but they have a huge selection of stamps, too.
By the way, I think your idea of making sets of sympathy cards for your elderly aunts is a very thoughtful idea. The reality is that older people do go to lots of funerals, and it can be hard to get out and buy cards as you get older.
I have a very good friend who is a senior, in overall great physical shape and health, but has macular degeneration and has lost enough vision that she cannot drive anymore. I keep her supplied with all sorts of cards, and she really appreciates it.