Runway / Tarmac base

Check with the online sites, they make several styles ( WWI, WWII, carrier, PSP, etc) in the major scales.  You can also make your own out of wet/dry sandpaper, posterboard and other materials and paint/weather to what you want.

Squadron shows  a couple of different types from True Detail, might take a look at TD's site.

You can also call up pics of any tarmac in the world on the computer and print them out yourself. I do that a lot and then reduce or increase them to the right size for the model then paste to a wood base. I do not attach most planes to the base so that I can switch them out.

Hope that this helps.

Jim