Nice tool. Put an ebay search in for the blades. They'll show up. Everything shows up.
Worse scenario buy several of the saws in crappy condition but only ones with blades. Broken blades are OK too. Any machine shop(die shop) can use the mount part and weld and reharden another piece from other jigsaw blades on that part for you.It would be well worth the effort and expense to be able to run that jewel.