HI Paul
I have photos taken alongside an inch tape so can work out the dimensions for you to make a replacement. Unfortunately I am away from home at the moment so if it is not too urgent please e-mail me direct about the 3rd April and I will be able to send you the photos and the dimensions. If you are in a panic I may be able to mail tthe dimensions later this evening, if I have not drunk too much vino.
Cheers, Slieve