http://www.sanduskycabinets.com/flipbook/?page=2

According to Sandusky customer service, most of the Buddy Products line was discontinued in 2019 and remaining portions were sold to https://www.metalcabinetstore.com/ which may or may not have them.

http://www.sanduskycabinets.com/flipbook/?page=2

Page 2 of the Sandusky Lee / Sandusky Buddy catalog indicates that page 52 has File Card Storage Boxes, but the page doesn't exist in this version of the 2020 catalog.

https://www.metalcabinetstore.com/shopping/products/5157-card-and-multimedia-files-28-d/

MetalCabinetStore.com carries Tennsco card files, but doesn't seem to have any of the Buddy Products. Apparently they're just a distributor and likely just bought out remaining product from Sandusky rather than taking over manufacturing operations.

Alas...

http://directlyyours.com/?page=shop/flypage&product_id=1820

https://directlyyours.com/index.php?page=shop/flypage&product_id=1820

Buddy apparently manufactured a relatively wide range of card index files in 3 x 5", 4 x 6", 5 x 8", 6 x 9" formats, they now seem to be discontinued.

http://www.sanduskycabinets.com/

Need confirmation, but my supposition is that Sandusky bought out Buddy Products.