http://www.toolstation.com/shop/Scre.../sd3165/p66702

these ones look like what i've got, we've got wooden battons in the kitchen and the units have been fixed to them and to each other to stop them falling over, for want of a better word, and i've moved stuff about as we had to do some plastering behind and now we've obviously lost the screws

but i only need about 5 at the most, so don't really want to shell out on thousands