There is a small nursery just east of Colony Plaza, also on the left side on 466A. I THINK they had pine straw.
We toted a few bundles last year, our first year here and then we discovered pine bark chip mulch at Walmart on 466 (not the other one). It biodegrades, is friendly to flowers and doesn't get HOT like rocks. I like the look of it and I spread it all myself.