Armor parties aren't generally advertised. As far as I know there isn't one planned any time soon but when you get your armor we can see about getting having one
In the mean time, you're in the right place! Keep reading and learning here. You can also get in contact with the Canadian Garrison CO, Roy: ti829@rogers.com and let him know that you're in the process of a build and interested in joining. If you can, come out to an event and meet some of us. It'll give you a good idea of what goes on.