I picked them up from Fentek-Ind(with the exception of the Red Esc, thats SP), pretty sure I found their link here buried in a thread somewhere, they sold me the rest of the ALPS caps they had.
Here is a pic of the keys I got
They also sent me these, but the green key wasn't alps so I couldn't use it, and I am already using a red escape, I might make use of the panic on another board I have.
And here is a shot of the switch.