keep in mind a few things with bowfin (some of which have already been alluded to, but are worth clarifying/repeating) :
- juvenile bowfin are very sensitive, i would make sure you have experience maintaining them and rearing them to stable size before committing to too much. for every 5-10 very small YOY fish, only 1-2 seem to make it to 6-8"
- legal issues are a big deal, i would talk to the DNR and find out what your state regulations are. in most cases, if they are small fish taken from the wild you can't sell them, but you never know until you look it up/talk with them.
- on shipping from the US to Canada or vice versa...this is a major pain and i would not get into it unless you have a lot of extra time to do the paperwork, deal with US Fish & wildlife, pay the fees for export permits, etc. trust me, i have researched this thoroughly and done it for the reverse (Canada to US). small YOY (young of the year) bowfin also ship extremely poorly, so it would be an especially risky/costly endeavor on several levels.
best of luck - at the very least you should keep some for yourself and raise them - they are great fish and bulletproof once they hit that 8" mark!--
--solomon