The link below is a the headlight plate that I drew up. I probably went overboard with some details, given how small they end up when printed. I probably also provided myself with more "3D" parts than necessary.
CT-114_Headlight_Plate_for_Clear_Nosecone
I'll gladly share a nose canopy with you if it succeeds. In fact, I think I might build a second mold now, so that if it does succeed I'll already have a spare mold to share.
Here are a couple of images of the nosecone mold in its early stages of existence.
In the images above, you can see that I've only just started to scrape away the cardstock used to produce the initial form. I drew a vertical line down the centre just to remind me which way it needs to be oriented, until I can refine the shape. I'll probably use epoxy putty to build any low spots up, and to build a skirt around it for better results while vacuum forming.