Buy one and cut it down. I needed a row of 200mm deep ones,
and did just this. As someone else said, you might find the
wall units are the same size, other than the depth, and
slightly cheaper. You will probably want to buy an 8mm
dowel kit, to make up for some of the fixings you will
inevitably cut off.
HomeOwnersHub.com is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here.
All logos and trade names are the property of their respective owners.