In New Orleans (and surrounding areas), we have a large, dusty industry of salvaging old long leaf pine and either reusing it directly or re-milling larger pieces like beams into flooring etc. You can easily pick up old growth pine with tight grain here, but depending on where these kits sourced their wood, it is probably the wrong species. Might still be closer than anything you can find locally. If you ever make a trip to New Orleans, most salvage stores like The Bank, Riccas, Demo Diva etc will sell you a chunk of wood no problem.