I was trying to get a ninja keycap groupbuy together made by sp. They are rather high. They claim the higher cost is due to having to change all of their machines for side printing... but if you think the pad printing is expensive, the price I got for single injection molded raised legend caps at $500 each cap. LOLWUT. I tried to reach Fentek too, but have never been able to get any response out of them.
KBC has some ninja style pbt caps that are dyesubbed. Though I've only seen them in yellow or orange so far.