[Ron Ramirez]

Bob, it would seem that you shouldn't have too much difficulty finding an H-13 as it was used in many Philco models such as:

16B, 18D, 18H, 18L, 18X, 116B (early), 118D, 118H, 118X, 118MX, 503L, 507L

and in the following - consoles only: 650, 655, 660, 665

However...as popular as model 16 (and 116B) sets are, that may limit your ability to find a good one.

Good luck!