The static content upload tool might help but then you'd have to upload each item one by one and make all the links work.
Suppose attaching the package as a ZIP archive to a document is the only alternative: users would have to download it and then open it locally.
I'm in the same boat. Looking for a way to upload the HTML documents. I don't think uploading one by one bothers me, but I'm curious how it would render in Jive.