Hi there,
I'm in Australia too, the closest to baby aspirin is low dose like Cartia etc (which is 100mg) - I plan on either biting in half (which ruins the coating on them that prevents sore tummies), or taking one or two a week and monitoring.
Are you already on the aussie FB group? I get confused about GD names and real names!
Oh, and I am doing March too ... eek - it is coming up soon! *breathe*