58GMC,
Sorry it took so long to get back to you, but I was away from home for a few days.
I stopped in and talked to Scott on Tuesday and asked about the patch panels. As far as he is aware, no-one manufactures just the top 'eyebrows' for the '58 or '59 truck.
Keep your eyes open for fenders on the parts pages, that's where I found mine.
Good Luck!
Lane
