An old trick was to get a sewing supply tracing wheel and make a pattern of small pin holes in the gel. Might change the color ever so slightly, but it never bothered me. Gel did last longer as some heat/light passed through the holes.
Precisew Pattern Tracer in Patternmaking Supplies: Sewing Supplies & Alteration Supplies by Sew True.com
Ah I totally forgot about a pounce wheel! A good all metal pounce wheel seems to be hard to get in stores these days.
For those with the budget, there is the Apollo Gelmiser
A wish I could find a good online vender for traditional glass filters, I wonder how their pricing compares to dichroic. I would think they'd cost less, but then again, maybe not.