If wood models are not the important to you, but 1/72nd scale models of your choice. Build them crudely (no antenna, no bombs, no drop tanks, no cockpit detail, cut off the propeller blades, glue them together, sand them down and paint them flat black (including clear canopy/windows). One hell of a lot quicker doing one from scratch and you could get quite a bit of diversity. I have a used model shop in my area where you can get some old kits REAL cheap.