Some Inlay Stickers are listed on Amazon, but the full line can be found on the official website:
I have a bunch of cherry blossom stickers for my other bass but that’s a work in progress. Y̶o̶u̶ ̶c̶a̶n̶ ̶s̶e̶e̶ ̶t̶h̶e̶m̶ ̶o̶n̶ ̶a̶ ̶g̶u̶i̶t̶a̶r̶ ̶i̶n̶ ̶t̶h̶i̶s̶ ̶v̶i̶d̶e̶o̶:̶
ETA: Wombat informs me Saki’s inlays are the real deal. But the inlay stickers look just like them! 
They say that these stickers do not damage the finish. That looks to be the case though I won’t know 100% until I remove them (not happening anytime soon).
There’s also this brand though I haven’t tried any of their product yet: