In case anyone find this helpful, here's my project on mouser (grand total of $63):
http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=0b0ae93f48
(Can mouser projects be shared like this?)
This is for the 12AU7 version. It includes everything (case, heatsink, etc.) except wires, tubes, tube sockets, and the CISCO PSU. It's basically the version as seen on Instructables:
http://www.instructables.com/id/Headphone-Hybrid-Tube-Amp-SSMH/
Some notes:
1. There is a smaller Hammond case that can be used, but the heatsink will occupy the entire top of the that case, so holes will need to be drilled on the heatsink for tubes to poke through if you go with the smaller case (~$4 cheaper). The case has several color options (BK for black, RD for red, YL for yellow, etc.)
2. I put in the Alps RK097 pot/switch combination. It's about the same price as the Alpha, but has the builtin switch. Saves a separate switch and drilling another hole in the case for it.