The folks at APEX are very nice to work with and they understand what we are using the drums for. I think I paid a little bit more ($40) as I wanted a that straight sided drum for R2. Just tell them you want a "BBQ drum", and tell then open or closed head.
They took me back into the processing area and let me pick out the style of drum I wanted. Then I could pick out the lid (bungs or not), the type of clamp or not, and also if I wanted it painted or bare. Nice to have options. They even loaded it for me!