Where to find $2 bills in Houston?

Lunar New Year is coming up tomorrow and wanted to give something unique as Li Xi aka our traditional red envelope gift. I tried going to my BankofAmerica yesterday and they had no availability of $2 bills. C&D Scrap Metal advertises they pay in $2 bills, but does anyone know where in Houston $2 bills can also be found? Thanks much in advance for your help!