Another place to look for potentially useful brass parts is a Chandler's.
My brother raced a catamaran, normally until something broke.
Every visit to the West Coast/Vancouver meant another couple of handfuls
of brass bits.

Thank you for the saw build. I have a sneaking suspicion that a bow saw like yours
would be convenient at the rough-out stage for many of my wood carvings.
Particularly those in the range of 30-90cm.