A friend of mine had some of these miniatures and made an (illegal...
) casting mould for them. Sadly, the moulds were long gone, but I had the chance to grab some of these recasts. The quality of these recasts wasn't that good, as you might expect. There's a lot of GS work ahead to bring them into a presentable state.
However, that was more than 10 years ago, so you might get them on e(vil)bay by chance. Good luck.