Nope, you're one of the few lucky people that are doing it right
But more individuals probably have a single 2-inch mortar than those who have a single 6-pdr, 17-pdr or 25-pdr. Most people in this thread probably already have a spares tin as well though
I know the reenactor/collector market was so filled with demilled 2-inch mortars here in the USA back in the 1990s that the price fell to around $75 for the infantry pattern and $150 for the carrier mounted pattern complete with transit chest. And they were easy to legally reactivate with the proper federal application.