Hello,
I am the Manager of the Capital Construction division of the Real Property Directorate of Canada Customs. We own 104 land border sites located along the US/Canada border situated across the country. We are contemplating having aerial photographs taken of all our border crossings to include as part of our facilities portfolio. We have very strict contracting regulations to follow when dealing with contracts because of the various Trade agreements that we are subject to. I would like to receive a ballpark estimate, just to get a magnitude of costs, that we could anticipate before we decide whether or not we wish to pursue this. Example, between $50,000-$100,00 etc. Since we have not yet defined our exact needs, I would anticipate that we would want to have colour photos of a direct overhead view as well as possibly two other views. We would also want to own the negatives and also have electronic JPEG's of each photo. 
Of course, should we wish to go ahead with this idea, we would have to post any subsequent Request for Proposal on the Government on-line tendering process in any case of which you would be privy to bid. Please do not interpret this as a formal request but more as a ballpark estimate.