tireman, welcome. Good Choice. I know don't if anyone has those combos in stock yet. In answer to your question YES you can get stocks from lots of different places. You can also obtain stocks direct from H&R. If you go to the FAQ at the top of this forum you will find contact info for H&R. Give them a call and they can give current prices and selection of the stocks. Also, be advised, the length of the 20ga barrel is 22". If you would prefer 12ga over 20ga, you could buy just a rifle and have it fitted with a YOUTH 12ga barrel at the factory. Yes, 12ga-22" barrel. As far as I know, that is the only way to get a 22"12ga barrel. I have one, its sweet.