I have made a few, by hand, from refractors to large Dobs, the templates (PDF) are usually available Online.
There used to be an online app that allowed you to insert your scope specs and it would generate the pattern. It is a time consuming, and intricate process to hand cut them. I used Exacto knives and thin plastic sheets ( usually cover sheets from A4 sized notebooks sourced from newsagents). You obviously need patience and good vision, my eyes are too poor these days for such work now.
Still it is satisfying to c9mplete one if your up to the challenge.
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