Walmart offers the Coleman Cable 6-Foot 3-Outlet Extension Cord in Beige, model no. 035078823, for $6.14
offers it for the about the same.) Opt for in-store pickup
to avoid the $4.97 shipping charge. That's the lowest price we could find by $5. It's rated up to 13 amps.
It's still available at Amazon, however it's temporarily out of stock. (You can order it at this price for delivery when available.)