Um, is anywhere near Montgomery County, MD who does Hypertufa?

I have a fundraiser coming up and I'm donating a garden collection. I'd like to include a garden sign, like something that says, "Welcome to my garden", or something like that.

I've never done Hypertufa before. Yes, I'd like to get started but I don't know if I can get it down within just a week.

I was wondering if anyone might be able to help me make a such sign or even donate a sign? It's a non-profit registered animal rescue. Can give more details upon request.