[Elecraft] K1 4-band board wanted

[LL]

I'm acquiring a K1 with ATU, 30 and 40. Really would love to have 20 and 80.

If nothing else, I might be interested in seeing if it's possible to rework
the existing board for 20, instead of 30.

Is it possible to have four bands on two boards - that is, not on a
four-band board?
might it be possible to swap them out to switch bands, if needed, and only
two-band boards are available?

Thanks.