I ran across this on eBay. I do not need it, but if I had a large collection, I would be interested. This seller has 2 separate listings for two not matching but stylistically compatible filing cabinets at $750 a piece. Each has twelve drawers. Each drawer seems like they would accommodate 4 racks (maybe more). 4 x 12 = 48 racks a cabinet. They are tall, so efficient use of space and the filing cabinet label handles would help to keep things organized.
https://www.ebay.com/itm/134639416679
https://www.ebay.com/itm/134639429680
https://www.ebay.com/itm/134639416679
https://www.ebay.com/itm/134639429680