Yes I can scan into 3D just about anything. I was going to actually start scanning the LT500 boot, like you have and start with it. I think I can get somewhat close then send out the 3D printed model to some of you to check fitment, then you can give me some feedback and I can change the design etc... and iterate that way. Since I'm doing the 3D printing, its not costing me much to do that. I was having to buy the 3D prints, and each intake was costing me in excess of 200-250 ea. I've already paid for my printer sort of speak with the intakes I've printed so far.
Similarly I've done some work for another aftermarket company and designed them an intake. They made one with wire and electrical tape that was used to transfer the design/shape.
Speaking of printers, I was going to experiment with 3D printing Nylon Bridge material, pretty strong, tough and slick stuff. I think some nice bulky nylon case savers would be the bees knees on the R's...
lastly, modeling clay widely used to sculp parts etc.. that are then scanned. Might be easier than foam etc... you can buy modeling clay at any art shop pretty cheap.