Yes, KCLE, little known fact about BKL is that you can fly in from Canada or another foreign country (though I can't imagine a larger a/c wanting to land there) to clear customs.
At Hopkins I have often seen small jets come in, probably from Canada, and go to A14 where they can get a customs check before continuing on to their destination. When I say "small" I mean Lears and Hawkers. Plus the Sunworld International charter flight from Cancun always goes to A14.
I actually think it's a good idea for Customs to have an office there, because if someone needs to make an emergency landing after crossing Lake Erie from Canada, well, they can fix their problem and clear Customs at the same time!