Where to buy single small piece of wood?
I recently purchased a screw-mounted pull up bar that fits in my doorway. My problem is that the frame of the door is wider than the length of the bar at full extension. I'm looking for a small piece of wood about 4x4x4in that I can screw into the frame which I can then mount the bracket into. I checked the big box stores and it looks like I can only buy the entire post. Any suggestions?