This link should begin helping to fill all of that informational needs.
http://www.c4winnipeg.com/registrati...-registration/
If not, they have a handy dandy e-mail address where you can ask questions.
EDIT: Whoops, looks like their sold out of space for this year unfortunately. However if you are a member of Iacon North and know other members there one of them may be willing to help accommodate you, for a certain fee of course to use their table space.
https://www.facebook.com/iaconnorth
Just in case you aren't a member. Mind you most vendors from the group are willing to help out, however they also have a lot of items to sell too, so I can't guarantee anything. I would suggest looking into tables much earlier in the year next time if nothing works out for you this year, as the space is a premium and there are no small number of interested vendors for these conventions.