Thanks, UT. I've been through quite a few of the US, Canadian and European sites they give with no luck (in fact, only Hannants have listed as ever having them- the rest have a lot of his modern and WW2 stuff, no WWI). I tried a couple of the Brazilian sites as well, before deciding to put them on back-order from Hannants.
I can be patient, as it will be a while before I get to the D.III in any case.
Cheers.
Dal.