Little update, ordered a Willard battery case from the US, took a while to arrive, as I had it sent to a forwarder, but once in Holland, and when I picked it up, I immediately fitted it, and like it a lot!
Needs to have a little packing under the case, to lifting it about 3/4" up, and the nuts will be not so far down on the hold down rack.
Cheers,
Lex