The seller is able to supply blank noppoo key caps, but I don't think he'll be able to do mass order dyesub based on his response.
I tried to organize a group buy to get the full 104 key set of the white blank Noppoo keys from Plum, so I asked another seller(imsto) if he would dye sublimate those keys with the original Cherry font for us.
At first he had agreed to do it later this year, then when I tried to send him a few samples to experiment with he backed out.
So my attempt at this turned to a dead end.
Maybe if we send imsto a lot of request in PM, he will change his mind.
Personally I think the blank keycaps with ninja style metallic stickers would also look great.
http://www.kbdmania.net/xe/3258067#64
Btw as far as I can tell the Noppoo keys are very close, possibly they have the exact same profile as the original Cherry keys.