You might be able to get everything you need from a craft shop, frames certainly, but not sure about parchment but they will have a paintable substitute. Spraying with matt colours is easiest if your not handy with a brush. Stencils for designs. Originals rarely survive.
I'd actually thought about making or painting/whatever a shade ...
It never occured to me to "spray" paint though. good idea!
I've seen some really nice painted parchment shades. If i can get
my hands and wrists to work with me (rheumatoid arthritis and related problems) I'll probably give that a go and see what happens ... and if I like the results, may even post a picture of the lamp dressed in a Kanadiana Hat ... eh?
Hey ... one of the things I'm noticing in all my glass surfing is just
how many things have passed through my hands through the years,
and too bad that is, because I'm stunned at what some of these
things sell for NOW! Ah ... ignorance WAS bliss