I've found them for under 50 a side online for original mopar parts... dodge trucks I believe up to the early 90s used the same piece. They also repop them now I think.

68 Road Runner, 69 Belvedere, 71 Challenger Vert
340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z
66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram