WTB: Replacement Yamaha CX5MU Key Caps (would consider whole keyboard)

I am interested in either acquiring two specific replacement key caps for the Yamaha CX5MU (US market) computer. The key caps I am looking for are:
- The "F4/F9" key
- The right accent/tilde key

I would be willing to consider a keyboard assembly, not necessarily in working condition, if it was for the CXM5U and had most/all of the key caps (including the two I am looking for).

But please, don't part a working CX5M on my behalf.