Does anybody know of any pharmacies that have Ritalin in stock? Preferably NW, but willing to drive.

My son is on Ritalin, and his pills are almost out, I'm having a hard time finding somewhere with Ritalin in stock (HEB and Walgreens, both said none of their stores have any). If anybody knows a pharmacy that has it available let me know thanks. I am willing to drive but the closer to Cypress the better.