I was at the park yesterday and went into the Indy store and found something that I didn't expect to find at Disneyland.
Toy Guns and rifles! I forgot to take photos of it but examing them, they are similar to the ones you would find at Knotts Berry Farm 10 minutes away.
The pistols run around $10-$12 and the rifles, which are the bolt action toy ones are $17.
Knotts Merch has found its way to Disneyland. Haven't checked the Frontierland shop to see if they had something like it but I would guess they would.