If you’re a professional gaming company and you need physical props, I’d no-fooling go with the HPL Historical Society. Their stuff is amazing. For example: THE SHUNNED HOUSE‘s add-ons.
Their stuff is so good, I’m having real problems not breaking down and getting that Arkham Investigator’s Wallet they’re doing. I’m sorely tempted to buy it, then run the adventure they’re writing for it at a con. I just don’t have the cash for it, though.