Brake light bezel sizing??

[Woodhouse]

Hello all. Ordered the brake light bezel warning from LMC for my 69 F250 and it seems to be a hair too big. The canister diameter is a few mm too big. Has anyone had any sizing problems? Or does anyone have a spare one sitting around? I remember reading on a review somewhere that there were two different sizes for these things, wondering who supplies the right one? Any advice or help is welcomed. Thanks!