[sdiy] eurorack tapped strip (in M3) source pref. uk?

[Julian]

As the subject says realy -

I can only find the strip in m2.5.  Someone at the sdiy meet in cambridge 
said farnell, but all i can find is m2.5

Ive looked for m3 before, but dont think ive ever found any.  One of those 
irritating things that i keep forgetting about.

There must be somwhere where i can get the stuff in M3?

Thanks, Julian

(ps. if people dont know what im on about, its the 84hp strip that fits into 
the horizantal bars of eurorack subracks for housing the screws that hold 
the faceplates)