There are 5 electrolytic caps on these drives; all have 2.5mm lead spacing, 5mm diameter and 6mm height. Not all values are being manufactured with those dimensions any more, so in some cases you'll need to lay the replacements on their side in order to fit (C104, for example).
Thankfully...
The Apple FDHD Drive (Floppy Disk High Density) is a stand-alone external data storage and retrieval system that can record up to 1.4 megabytes of data on special high-density (HD), 3.5-inch disks. When used with the Apple File Exchange Utility (version 1.1 or later), the FDHD drive can provide...