If I had an Eye1 I wouldn't have posted my query in the first place. I'm relying on an eyeball estimate that the region from 90% to 100% may need attention. While you may not use the PoP anymore, it must still be valid, if somewhat limited.
Would you consider providing a service that would provide a linearity check to your regular customers (at a price, of course?) Otherwise, the only way to allay my concern would be order a custom profile, at $99, perhaps unnecessarily.
Alternatively, perhaps there is someone following this thread who would provide a linearity check for a reasonable fee?