Dear Sir
Here are what we are looking for. Please let me know as soon 
as  possible
The buses will be used for public transportation Overseas, 
long trips.
They should be preferably diesel fueled.
They must be air-con fitted.
They must be built for tough as they will be going on dirt roads in 
Europe and Africa, so they cannot be too low.
We are looking into 30 seats min and 50 seats max.
The availability of spares.

Please let me know the different makes and models that you 
can offer that fit the description above, Also price quote .
Thank you  for your help