I own a '95 Defender 90 Convertible, and have seen several similar cars in my town with plastic and/or fiberglass removable hardtops.
As I live in a ski resort, it gets fairly cold here, and I've lusted after on of these nifty roofs for a while... Problem is, I can't seem to find them anywhere, online or elsewhere. Were they an optional purchase from Land Rover when you bought the car, or an aftermarket item? I can't find *anything* on these hardtops.

Help?