What happened to your original radiator support?
Like you, I've only seen the U shaped radiator supports on the market. I'm thinking it may be specific to the 54 & 55 first trucks.
Does side angled part of your hood latch panel bolt up to the rad support you have? Maybe bolt it up on the sides, then figure out where you can add a piece of angle iron for the 4 bolts across the top.
