I always used the Sport/Pattern canopy from Wing MFG. They have been making this canopy since the seventies. I install the canopy forward of the leading edge, and put the hatch on the bottom.

http://www.wingmfg.com/Pages/WC3.html

I may have an original canopy from Bridi. If I do, and you're interested, let me know, and I'll drop it in the mail.---Tom