Hello Ian.
Found the undertray, I have included some photo's of it, if you want more let me know.
it has been lurking in my garage for years, it is obviously "not new" but it is unused, never been fitted. Unfortunately I do not know who the manufacturer was.
I have no packaging, fitting instructions etc. I think it should be easy enough to work out how to fit it.
Any more info you want, if your interested in it and it is what your looking for just shout up and I will reply asap.
Cheers.
Regards.
Phil.