Below are some of the more popular Retaining Wall Block that are IN STOCK NOW or readily available for delivery. Order for delivery by giving us a call or visit us to confirm availability or lead order times from the manufacturer due to current supply volatility, we serve the NJ, NY, and PA areas. Links are to Manufacturer websites with color selections, data sheets, etc. Retaining Wall Block manufacturers displayed below: Keystone Hardscapes and Unilock.