RM,
I've also made large jointed swimbaits, 12"+, with AZEK decking. And smaller 7" four piece baits with their trim board.
Home Depot doesn't stock either, but you can order it through their online store, and have it delivered to your local store, free, for you to pick up.
I used to get it through my local lumber yard, but I moved, and haven't tried to do that up here yet.
I am able to make thicker pieces by gluing thinner pieces together with either plumber's PVC primer and glue, or super glue, for smaller stuff.