I've noticed here lately that hat coils are getting harder to find.

Does anyone know of any good sources?

Here is a little article on Steven’s Magic web site written by Billy McComb on making and using an “impromptu” hat coil:
http://www.stevensmagic.com/gemini/Billy......oils.htm

Back in the day I got mine from Barry’s Magic Shop (I’d buy 20 to 30 at a time). I forgot how much fun they were, how easy to use/produce, and what a great reaction it got from an audience.

Barry’s Magic Shop
https://www.barrysmagicshop.com/index.ph......ts_id=73

Here are a few other sources:
Empire Magic
http://www.empiremagic.com/docs/assy13.html

The Trickery
https://www.thetrickery.com/full/Magic-T......7132.htm

Midwest Magic
https://midwestmagic.net/shop/category.asp?catid=171

For the uninitiated, guys, what's the effect? Thanks, Jim

Google "telex paper rolls". Basically the same stuff.

FWIW

Mandarin the basic effect: From an empty container (normally a borrowed hat) yards and yards and yards of paper streamer spills out. It piles up on the floor in an impossibly huge heap. A final production can be made from this heap of paper streamer.