If that haban takes the smaller obsolete blades STAY away from it. guards blades etc can add up in a big hurry.
You'd be better of adapting a large sickle that takes currently available blades, ledgers and guards. If you do buy and discover how hard it is to rebuild it affordabley drop me a PM I have parts.
Poncho, well done on the project. I like seeing and doing that sort of thing.
Make it work, cause anything is possible.
So, yep that's what I'm gonna do. Find a fairly new unit and adapt it as need be. I'll spend the summer collecting, and work on it next winter.