Will HHKB Pro 2 keycaps fit on a HHKB Pro JP?

[Flaubertt]

I think that a HHKB Pro JP would look awesome with blank keycaps, so I'm looking at the HHKB Pro 2 blank keycap set from the PFU site. http://www.pfu.fujitsu.com/direct/hhkb/detail_keytop.html
Because the HHKB Pro JP doesn't have this option. http://www.pfu.fujitsu.com/direct/hhkb/detail_keytop-projp.html

I'm still very new to keyboard technicalities, and I'm wondering if the Pro 2 keycaps will fit on the Pro JP? (I'd only like to swap the letter keys.) Maybe I'm missing something, because the Chrome translation isn't exactly great. Also, the Pro 2 keycap set is 4,500 yens, which at ~45 dollars makes me ask whether I can find a set of blank PBT caps cheaper.

I've also been searching for O-rings that will fit on this keyboard, but all the 'HHKB silent mod' threads that I've found either showcase self-cut O-rings or don't give details about where to buy them. Also, I haven't been able to find anything about adding (more) O-rings to a Type S. Does anyone happen to know where can I find ready-made HHKB-Pro-JP-Type-S-compatible O-rings?

Thank you very much!

[jabar]

If only going for the alpha keys, it will be compatible except for around the ISO enter (you may need to use some of the printed keys there).