Actually found this very well designed FREEWARE Airport right here on Simviation, that was posted back in 2011 !
Says its for 2004 - but - I injected it into FSX Gold / Acceleration and it worked fine !!
Airport : LTBR / in the country of Turkey
mostly custom designed Airport Terminal - Hangers - and other buildings , hardly any Default buildings used !!!
Simviation Link : http://simviation.com/1/search?submit=1&keywords=LTBR&x=0&y=0
Go ahead try it out, Guarantee ya, you won't be disappointed !!!!