Have you tried your local gl*** company? If they can order it breakage during shipping or installation is on them, not you!
Good luck! I couldn't find one 15 years ago when the one in my truck got cracked. They only fit 54 and early 55, late 55 is different, 53 was a 2 piece flat gl***. They do fit all size Dodge trucks, from pickup to semi tractors. 54 & early 55 are curved gl*** with straight door pillars. Late 55- 60 (or 61) are curved gl*** with dog legs in the door posts. 54 is a C-1 cab. late 55 is a C-3 cab. Gene