Since all the Dove stuff is being sold off, I'd think it'd be possible for some enterprising soul to go into the business. The rockers are extrusions, and weren't made at the Dove facility. The rocker arm set-up was all housed in one room, and the equipment to turn the extrusions into rocker arms is very likely for sale. You'd need to make such things as the adjusting screws, etc, which were done on one or more of the screw-machines that formed the bulk of Dove's core business.
KS