Yes, they are called Antonius and from the picture on the directions it looks like they have a taller version of it also (looks like 5 shelves.
The pricing was (Im estimating) $7 for the rack, $1.99 for each basket and the rest was for the castors. If you want to stack them, you would only need one set of the castors. They also have plastic bins that are about 2X the depth of the baskets but are solid, so you would only be able to fit 2 on this size. I already put in some soap and it held a ton just in one basket...Im def going to get more of these and stack them!
I love IKEA, especially for storage. As usual it was a cinch to assemble.