Hey, I am old.
The national sales manager at Joseph Audio responded to my email. I will have to ship my speakers to them (I assume to NY) and they must do the xover swap. They'll pay for return shipment.
Total cost for me is $350 + shipping to them. That's a bit too steep for me until I get a job. I'll seriously consider it after becoming employed again (or when I great lessen my expenses by selling the house and moving).