Rolled mine around a piece of old scaffold pole. Wish I had made it a couple of inches longer. Having seen yours I want to fill it all in now! My MK1 didn’t have the opening in the front but I couldn’t resist playing around so made another. It still appears to function ok because the underside of the bonnet seem to be collecting less grime. I did take it off for the MOT to allow full inspection though.
Good luck with yours, can’t wait to see it.
