I sent an email to the finnish retailer and will check what they carry.
Not really for PBT. If you want POM look for same but with a -2 on the end instead of -0 or doubleshot ABS then you would want H*N or H**NO codes but they are pretty uncommon. You could take keycaps from G81 models too, but not all the keys will fit.
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Is the set of the picture OEM or Cherry profile? Is it still available?