Welcome, I also run a set of Ohm Is, love them. Bought them a few years ago form the original owner in Maine. I purchased and rebuilt a 700B from ebay using the WhiteOak products with a lot of help from this board.
I replaced the woofers in my speakers, as you probably know Ohm is still in business and fully supports the Ohm Is.
As far as your amp, if the meters are still working your amp may be easily fixed. meters are pretty much on the speaker terminals, no?