Lowe’s has both the Big 12 and Speedlite Square in one pack on sale for $2.49.
YMMV for pricing and availability as I’ve checked few stores around me and some are still showing $5.98 where others are on sale for $2.49.
https://www.lowes.com/pd/Swanson-…1000638885
https://brickseek.com/lowes-inven…1000638