I have mine machined.
Not full tested yet, but worked well in basic test.
I´m on a trip until next wednesday. But if you are interested I can take the measures so you can have an idea to get them machined. It was not that cheap. But the machinist charged the hours of test and try. With the measures I will draw a CAD design and take them to a CNC machine shop for the next set to see if it´s cheaper ("machine exactly this" instead of "ok, lets try with this shaft a little wider").
The cost was a little more than U$ 200 for eight pushbuttons and seven lever controls (not photgraphed). For this last you could just buy them from Ikelite.
The buttons:
http://picasaweb.google.com/XTREME.ALEK/UN...gCIC0-LGyjKPcMw#
I wanted modular pushbuttons, so in different housings for different cameras I have just to drill a hole (10mm in this case) where the button should go.
There is another member that just machined the acrylic cover of his housing to acomodate the pushbuttons.
Good luck with your search.
Best regards
Alejandro