1947 Brake drums

[Stuart Twitchell]

Good afternoon,
i have a 1947 ford 1/2 ton pickup that i need a new brake drum for.
it has the square back spindles and the hubs are on the inside of the drum with a 3.25" hole. All seems normal and stock
But the bolt pattern is 5 x 4.5 instead of 5 x 5.5 that most places sell.
Any idea on what drum i need?
Thank you.