In USA the company Park Flyer Plastics has many canopies for old classic pattern planes.
This Company can actually make copies of an existing original plastic canopy. They use the original canopy as mould so it will be destroyed but the copies made are even better then the original.
I had two canopies made this way, one for a very rare MK super Chipmunk 120 F3A plane and one for the Swedish Mustfire design (from 1960th) RC-1/F3A plane. Other people has this way been able to get canopies for these planes.
https://parkflyerplastics.com
See under Canopies (diveded into 4 categories: Vintage, Jets, Bubble and War bird).
Example of Vintage canopies:
Curare, MK Joker, Cosmos, Atlas, Tiger Tail, Banshee, Mach One, Dirty Birdy etc.
Maybe some canopy they have could fit a Saphir.
/Bo