I built my own bed as I couldn’t find any beds that would fit my needs or wants.
I don’t want to hy-jack your thread but here’s some pics that might help with some of your questions.
I made my bed 9’-6” not including the bumper, the spare is mounted up against the cab which left 8’-6” of useable bed space for the TC.
Here’s a pic of the tie-down points incorporated with the body to frame points.
With the Headache rack I matched the contour of the cab and made the height two inches higher.
I had Linex sprayed on the bed interior during the painting process.
Finished product.
