There is a Haban group on Yahoo where you can get all kinds of information. As far as sickle sections and guards, you get them through Webbs sickle service in Nebraska.
I have two units which neither were built for Cubs. I have modified one to be a rear mount on a Super. Took it on it's maiden run last weekend. A few bugs to work out but it is going to be a useful tool.

Thanks for the help, I ended up getting it along with some other misc items, it might just end up being parts for a more complete unit but we"ll see not hurting anything now.

What's it missing? There aren't too many special parts on one. Most are either fabricated, off the shelf or can be made fairly easily.