Updated, following my recent home move I now have several Hi-Fi Racks Ltd surplus oak rack shelves available (not boxed, they are bubble wrapped):

1200 mm x 2
995 mm x 1
600 mm x 5

I have various leg lengths to go with above. All shelves are the standard 400 mm deep.
I know that Hi-Fi Racks closed down and the company that took over the manufacturing kit and jigs are not servicing previous customers so there may be people out there that may want the odd matching shelf for kit changes.

I have finally checked all the leg sizes I have available:

1 x 50mm
4 x 65mm
5 x 105mm
8 x 135mm
13 x 185mm
9 x 225mm
4 x 305mm

Everything is stored in my Gorleston bungalow garage. Enquiries via PM.

Cinema: DSP750 x3, DSP3300 x 4, DSW.2 x 2, Trinnov A32, 271, Oppo 203, Toshiba HD-DVD, SKY Puck, Sony XW7000 PJ, Screen Research AT Screen
Lounge: 861v8, UHD722, DSP8000SEPP, DSP7200HCSE, DSP3300, DSW x 2, 504, C15, Sony UBP-X800, SKY Puck
Bedroom: DSP5200SEHC, G65, UHD722, DSW, M6, C15, SKY Puck
Spare: 818v3, 861v8, DSP5200HCSE