Thanks guys, that's what I needed to know. I called BAK Industries and I managed to speak to so done who's paid to read from a cue card. "we don't take custom orders and we don't up have one that will fit your truck.". There wasn't anyone I could talk to about which pieces might work or even give me hints. I'll have to settle for "it ain't possible".
Wish I had a neighbor that had one so I could try to dup it...