saw the inlay stickers at daisy rock at paradiz centre b1, cost $10 to $20, mostly at $12.90, huge range of designs from tree of life, prs birds, man-transforming-to-were-wolf, trapeziums, stars, etc...
paradiz centre is between the cathay and city music, the building with Singapore pools, 7-11, and a food court + coldstorage at the basement.
i'm not sure if anywhere else sell them...
btw i have never bought or applied any of them, liked my guitar the way it is...