What's the brandname, perrigo? I prefer the ani generics.
I would check several of your local brick-and-mortar pharmacies, and also the preferred mail-order pharmacy of you insurance. Generally those mail-order pharmacies have a broader reach of suppliers than the local stores do.
I'd use the NDC codes that pharmacies use, to better find it. Here's the one for perrigo: NDC Code(s): 45802-098-28, 45802-098-46, 45802-098-51
Packager: Perrigo New York Inc
https://dailymed.nlm.nih.gov/dailymed/druginfo.cfm?setid=a4ddf68d-1502-4242-89aa-c96436bdcbf6