DIY micarta with glow powder was something I explored- doesn't work. The GITD powder really doesn't like being sanded. There are GITD polymers that you can work like G10, but they are kinda pricey.
Orange and yellow 91mm scales are a little tricky as they are rather uncommon. Sometimes you can find GITD scales that were pulled through eBay, particularly Central Valley, but these are just as rare. Your best bet would be find a low cost, new SAK and pull the GITD scales.
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