Try Master Power Brakes and see if they can help out.
Yep sounds/looks like SSBC bit the dust . Their website/domain is abandoned.
One would hope another company bought them out or the company is getting reorganized & not yet ready for prime time.
Summit & Jegs's are still listing their products but that may be limited to stock on hand.
Hopefully Summit and Jeg's are not taking orders on " Phantom Catalog Inventory" .
You may see SSBC inventory getting liquidated on e-bay,Amazon & Carrid.