JLeigh, if you're already wrapping with a stretchy, it's not hard to jump to a woven. 100% cotton is cooler than a stretchy (as is linen, but not as soft). You can try slightly smaller sizes to limit the amount of fabric you have to wear. My HAB stretchy is about the same as a size six. With a newbie I could manage most carries with a four and by the time bub was bigger, I was much more adept at back and simple carries.

I did notice Ergo are releasing a carrier with a mesh front, but since summer will be over soon enough, I'm not tempted.

There's a FB babywearing buy swap sell page for Australia that lists lots of secondhand wraps, carriers, etc. if you PM me I can friend you and add to that group.