Greg Kramer of Kramer Handgun Leather makes his holsters from horsehide. Thinner, stronger, and denser than cowhide leather. You can also go to a synthetic, but I don't like them.
"Valor needs first strength, then a weapon."
-- J. R. R. Tolkien (1892-1973)
"Free men have arms; slaves do not."
-- William Blackstone (1723-1780)