The dealer probably wont have the pocket since I dont think there are any Subarus that come with them stock. I got mine from a local stereo shop. I know that Huck adapted the pull out cupholders from the legacy series to fit that open hole. I think there are some pictures in his locker under the 94 L. I think thats what I want to try next...

There is a thread in the general section titled "cupholders" where Huck explains how to do this.