where can I buy the keycap set for replace?

[yangzepa]

https://vimeo.com/476402575

i found the video that the cosmo communicator key can be replaced.
but where can I buy the keycap set?
i bought the secondhanded cosmo from other country, so I'd like to change the keycap set as my language(korean), IF i can buy the set.

[yangzepa]

self-answered.

I've contacted to planet computer support, and they told me that I can buy the keycap set with 39 GBP.