Parts discovery!
I just discovered that the Vulcan 450 seems to borrow it's main drive/tail drive parts from the Dragonus II nv. The Dragonus uses the same belt drive arrangement and the parts as photographed and listed here
http://www.helidirect.com/index.php?...sort=2a&page=2 . The tail drive cog, main drive gear and main drive gear housing and the MXL 453 belt on the following page LOOK like the Vulcan parts. Some of the aluminum parts listed as "collar" also look like the Vulcan pieces. The part they call a "collar" is an aluminum post with screw sockets at both ends similar to the pieces that connect the Vulcan flat frame pieces.
This makes me a bit happer as I have found almost all the necessary parts. The only parts that I have not found are the Vulcan frame items that are different from the Pigeon and the GL450.