Althor Products has an excellent selection at reasonable prices, but as far
as I know they do not have a website.

AHC/Althor Products            Storage boxes for shells.           AHC/Althor Products, 2 Turnage Lane, P.O. Box 640, Bethel, CT
06801-2853           Tel.: (203) 830-6060; (1-800-688-2693); Fax: (203) 830-6064