Adopt a rescue! Bostons are wonderful dogs. I am biased because I have 2.
www.petfinder.com has many bostons. Just put your zip in and see what comes up. Let us know what you do. And as Karen said, there is no such thing as a miniature boston terrier. They greatly vary in weight 12-35 lbs. I have a 22 and a 30 pounder. They are my first children. Feel free to PM me for other boston terrier related resources.

Also, I can confirm that they do come with an array of health problems. Frankie has had from mild to severe: seasonal allegies treated with 100$ a month pills, cherry eye and luxating patella. All his surgeries including neuter have cost us well over 3000.
With Beenie we were lucky, so far she has only has demodex mange as a puppy, but that cleared up as she got a stronger immune system when she got older.

They are very high energy dogs so if you can't walk/play with them often, be prepared to find your baseboards eaten up as well as other surprises!! LOL

carmen