Want to Buy Linhof Technika 5x7 lens board (or 4x5 adapter board)

[PBphoto]

I'm looking for a nice lens board for my Linhof technical from 1953
or a adapter that fits the 5x7 (camera) and accepts 4x5 lens boards ...

preferabel undrilled or with a copal 0 or 1 hole

thanks for the effort ...