You know, it's odd. As much as I love Prowl, I've got very little material that features him. The closest I have is some designs from Roll For It, the aircraft factory where Prowl's battle computer gets damaged, forcing him to link up through the phone lines with Chip Chase. The same Chip Chase who was in possession of the anti-matter formula that Megatron was trying to steal. (Oh, coincidences abound in Roll For It.)
I like Chip's room. He sure does like . . . colleges, doesn't he? Also, is that a unicorn bookend on his desk? Oy! It's hard to imagine why they never wrote in a love interest for this bad boy.
While I have no illusions that Headmasters were in the works this early in the game, I do like the idea of an Autobot/human partnership being highly effective. It's a tiny bit of serendipity that helps the story be greater than the sum of its parts. Incidentally, the Chip/Prowl relationship would later be picked up on for the Binaltech line. When Prowl's laser core, which some fans theorize is an early form of spark chamber, is lost during the BT upgrade process, Chip Chase transfers his life essence into the incomplete Prowl body to create Prowl II. The new body had two separate computer systems, one dedicated to each different ego.
Oddly, I've got a whole 'nother couple or three pages on Roll For It, which explains why I sort of start speaking about it in the middle of the episode. These pages weren't quite finished when I realized we just wouldn't have the room for them, so don't be too harsh.
1/5/2010 Update - additional Roll For It models are now posted.