Is there a better deal on gels than the Buff 20 pack?

I've been using the roscolux swatches on a Speedlite to gel my backgrounds. It works but I'm getting tired of dealing with the batteries and the limited power, and planning to acquire another strobe for that purpose.

I'll need a decent variety of properly-sized colored gels, and I see this 20-pack offered by Paul C. Buff for $48.95. I can do more searching but I'm wondering if there's a better deal out there (for US customers), i.e. more variety, bigger sheets, or lower cost?

Rosco gel sheets at local theatrical supply store. 20x22 is like $5.

Thanks.
I don't have a "local" theatrical supply store, but I can get the gel sheets at B&H. 20 colors would cost about $100.