First don't post wanted ads outside the classifieds section, even if it's not guns.
Second XT is probably good. You can get them from private/classified sales but you have to be AV'ed to get in on them (or at least meet people selling their stuff face to face so they know you're 18+, ie. after a game at a field you see they're selling their gun and show you're 18+ in this case you aren't AV'ed but the seller knows you're 18+).
I actually run a "rifleman" setup with a replica RAV vest. Check local surplus stores for clothes otherwise I have no idea where else to go if you want to stay local. If you want to stay in Canada there are a few places I know like DS Tactical (Daves Surplus), Drop Zone Tactical
, Seals Action Gear
, 911 Supply
Then if you want to go internationally then your options open a lot more. Flecktarn.co.uk (don't worry they don't just stock Fleck they have British DPM and Danish M82 or w/e) is one place that stands out in my mind that I was looking at for BDU's. There's also AirsoftPark which I've had great success with, they're awesome Based out of HK I believe but ships from a warehouse in Singapore or Malaysia or something like that.