I'm not too familiar with these things so I'm hoping someone here can help.
Babies r us have a carseat advertised on the front page of their catalogue as being half price on sale. I've been calling around stores since the sale started and no one has them in stock.
I recently asked for a raincheck and was told that they're not getting any more stock as it is a clearance colour.
Correct me if I'm wrong, but I recall hearing something about a store having enough stock to reasonable satisfy expected demand when they advertise an item.
I would like to buy the carseat in a different colour at sale price - do I have a leg to stand on?
You recall correctly. The ACL says that advertised items must be available in reasonable quantities (unless otherwise specified).
Now, the real problem is, how are you going to enforce your consumer rights?