I would restore that in a heartbeat without thinking about it. You can rebuild the head, build a new one if necessary, or if you don't mind moving away from the original design, you could use a regular wedge shaped head which you might have more success finding.
The broken score reel isn't a big deal. If you can't somehow glue it back together, you can always find a replacement on Ebay or post here under the parts seeking thread.
Good Luck!