That's a real spanner in the works (no pun intended).
Now that mines apart I'm going to not only loctite but lockwire the bastard' things.
If it were me I'd strip the engine down and assess wether it's worth fixing or not, just bear in mind that all the bearing will
need replacing, one of which has a locating tab to prevent it spinning around in the case; as I found out nobody produces this particular model. Suzuki billed me £60, had to bite the bullet...
If anything you could always break the engine and sell it as spares to help fund another block.
If you need help with stripping the engine I can give you a lowdown on where you can and can't cut corners.
Good luck and keep us posted!