[kennysoona]

You could probably pay for someone to fix the few rendering/incompatible issues with those old binary formats as a patch. Any paid solution would likely have similar issues, so paying for the functionally you want/need directly is likely the only alternative to just using Word directly, and you could give back to the community in a big way if that's something you value. It might cost as little as $200 or so.

The problem is I think so few people care about those old binary formats these days, so there probably isn't much demand to improve compatibility for the edge cases you are encountering.