After putting together my Shruthi-1 I found this thread on the Mutable Instruments forum on a kit called the Little Dieter that was put together by a guy called Frank. You can check out his webpage here and his Flickr page here which also has instructions for putting the Little Dieter together. It provides a panel in eurorack standard and all switches, pots, LEDs, mechanical bits, resistors, knobs for the pots and connecting socketed wirey bits.
A Doepfer DIY board and the Little Dieter seems like a good way to go so I went ahead and bought a kit.
And here it is!
The blank panel. Beginning to put in pots....
And completed with knobs attached.
No power supply yet so I am yet to test it.