Sadly getting rid of my board.
A couple of bits of the wood have since been used for other things so to re-build to original dimensions you'd probably need to buy another 3600mm length of 45x70.
3 sheets of T-nutted 18mm ply (one of the sheets isn't quite full size as roughly a 200mm strip was cut off to make a kicker board)
In Sheffield S7, I have a van for a couple of weeks so can drop it off (except the long 3600mm lengths of wood, as they won't fit in)
£100 ish ?