Not to my knowledge, at least not in any shop that deals in USD directly. If you're glued to the idea of DSA maybe find some clear top gaterons or just buy some clear switch tops. Certain DSA colors allow enough light to pass through to cause a sort of glow which can sometimes allow you to see the legends. Check out Varmilo Mint keycaps on youtube (skip to the backlight part of the Awesome Sauce video) if you want a clear picture of how PBT can be illuminated.
There are some PBT keycaps with POM infill for backlighting but most are OEM or Cherry profile /shrug