1.5 hours isn't too bad a trip for the larger US base... Do you have another military member sponsoring your arrival? He/she may be able to give some tips on cars. You're also close to Belgium so there are some large Nato installations geographically close by (unless my memory serves me wrong as its been a few years now).
Plus you can search eBay or other online sites for your lemon of choice if needed.
Or if you want a fun road trip you could always check out the larger US bases for their lemon lots and make a trip out of going to get a car.