Stiff power cords are frustrating

I use wire ties to tie the cords to the rack's back supports (both the ties and rack are black, so not noticeable much). This keeps the cords from hanging and pulling on the component that they are attached to. Also, where the cord plugs into the component, I use a sorbothane footer between the plug and shelf to keep securely plugged in. You kind of have to be crafty with stiff cords - I use all Virtual Dynamics cables and cords - they are very stiff, but this can be managed with a bit of ingenuity. I must say that I do not have a confined workspace like yourself, but you may be able to use my techniques somehow. Hey…nobody said this hobby was easy!

Shunyata Helix cords are really flexible and not that heavy. Audience is very flexible.
Virtual Dynamics are very stiff, but can be "pre-bent" into shape. the other problem if the cord is heavy is the pull on the IEC sockets. You have to put something under the female IEC plug of the power cord to keep it level.

I have experience with DCCAs, Electraglide Epiphany and Elrod EPS-2. These are all fine cords but will need open rack to install them.

Pick the cord that sounds best, if its stiff, then pre-bend it into shape. I've found that this works great. Don't struggle with it, look at how you want it to go, then pre-bend it, then put it into place. I've had the VD Nite, Master and Revelation series. Yes they are stiff, but they sound very good, and when pre-bent there is not as much of a struggle.

John