So get them while you can if you need them. I have a recent set on the rears and was waiting to do suspension work on the front before replacing the second axle and found out that these are now discontinued (went to Costco).
Tire Rack still has them (at least in 225/60/15 V) for $94. Costco will still install them, but for $10 each.
I always hated mixing tires on a car, so I was lucky to look now and find them.