cant direct you but I can you give you my thoughts.
build one or have on custom built / if you know the right carpenter.
doesn't have to be elegant (unless your building for an SSL400)
I used grade A Pine and painted mine black. my desk has:
- 20 rack holder (for 19" rack gear)
- a place for my analog mixer (in the middle)
- My Mackie MCU Control surface to the Left
- spaces on each side for my speaker stands to be ear height.
I put the MCU unit on the left because this gives me 2 hand capabilities.
using the mouse and keyboard with my right hand, while allowing me to use my left hand on the MCU, to adjust faders, buttons, exc while still doing some pointing and clicking.
I also put a nice Vinyl padded arm rest across the whole desk for comfort. so glad I did because I spend a lot of time resting my hand on it, holding up my head in shame

for those OMG moments.
I will try to post pics of it later. its long too 8 ft long x 2 ft wide.
My best advise is to draw it out and try to create the feel of your workflow. this will help because in the long run there's always some last minute changes needed. if you plan well enough, you will minimize those.
Good luck
Chuck