Hey, Craig, I wish I knew about Weber's old steak rings, but I think this item will sear plenty good for you. These baskets come almost up to the bottom of the cooking grate, and that configuration will put out a bunch of heat.
But you can get them *much* cheaper direct from Weber. I think it's item #960080, and I believe I paid $18 for a pair of them this summer.
A friend of mine likes to turn his stamped metal baskets upside down and pile coals on top to sear steaks. And my preference is to use those wire-style coal holders to elevate an extra bottom grate right up under the cooking grate. But now that you mention it, I think I'll push these wire-style baskets together and give that a try next time I make steak.