Here is a list of cables and part numbers for those cables. 0.3M = 667T01M = PK5F43M = H25YT Doing some basic searches I was able to find various re sellers with these cables. I recall some people running into issues with the 0.3M cable when tight turns were involved, so may be best to stick with 1 or 3 meter cables.  If you go with 3rd party cables, ensure the cable is 1.4. And even then the some 3rd party cables may not be compatible.  Hope this helps
Hi everyone, I'm in a bit of a spot, as I need to add a PC5524P into a stack of 5548's, but Dell no longer seems to sell the HDMI stacking cable (I was in a chat session for over an hour verifying that...).  Ebay isn't showing anything with my searches, so I'm wondering what my options are at this point.  3rd party cables may be my only choice, but I've read several accounts of those being either flakey or slow, so I'm leery of just plugging something in. I'm in the middle of the project, so any help would be greatly appreciated. Thanks, -Michael
PowerConnect 5500 Series HDMI Stacking Cables - Difficulty Sourcing/Buying