<3.5"? That's a "standard" off-the-shelf IDE disk, isn't it? 2.5" is <a standard off-the-shelf laptop IDE drive. 1.8" drives are also I'd rather 2.5 or smaller but a really cheap 3.5 is ok. <Are you looking for drives that are still produced in quantity? If not, <the Kittyhawk 20MB drive would be a good one to get (at the website <mentioned previously). The is at most a one up for myself(non commercial design). Allison