Since you don't appear too hung-up on keeping things all original, why not just send out the -2 for the rebuild and keep the -1 for now.
That will give you more time to chase down the -2 bellhousing and clutch disc, reduce your R&R tasks to just one, and result in a more readily serviced -2 being in your car.
I suspect rebuilding the -1 may be more expensive than rebuilding the -2 because of parts availability, too.
And as more owners tend to be returning to stock, you might find a good market for your -1 for an owner trying to return their car to what it came came equipped with.
A -2 upgrade may also be of value if you ever decide to sell the car - heaven forbid.
Larry