Many of our Lotus cars are primarily made of fiberglass. During the restoration of my Lotus Europa S2 I’ve been making fiberglass plugs for certain parts like the instrument binnacle and center console. Once the parts are formed they should be far higher quality than the original cheapo thin plastic pieces.
I wish I had discovered this web site before I started. The fellow at Sceadu Design has written up a very impressive article about plugs, mold making and forming fiberglass parts. Before you start your own project give it a read.