As Penny noted, Walgreens carries the generic equivalent “Actavis” (ALZA 27 – for the 27 mg tablet). I once had Walgreens attempt to fill my son’s prescription with the other brand because they were out of the Actavis brand and I refused the medication and had them order the Actavis brand – which they did.
I’d try Walgreens. Walgreens also has an online portal which will let you know which brand they are filling with before you even get to the pharmacy so you can call them with any issues before going to the store for pick up.