ac cables falling out of IEC inlets on amps

It seems to me one solution would lie in the design of the inlet prongs.A possibility would be to spring load them by shaping each prong to be effectively a leaf spring.Easy.

Try to use cable ties to suspend the cable above the component so the weight of the cable is not pulling down the IEC connection.
On the other end, I have even gone as far as attaching L brackets to the wall above the wall outlet to be able to hang cable ties to support the weight of a heavy plug .

I have had good luck with PS Audio connectors and chose them because I now believe that the connectors and a vise-like junction is more important than the wire contained within the cord. I treat the prongs with conductor fluid and I know when I have trouble pulling out the plug that it is the right connector. I love the idea of a small screw tightener like computer serial cords. There's a marketing opportunity!

Elizabeth - Desoldering aids (copper braid, etc.) mean never having to say you are sorry.

The aftermarket retaining clips ARE available- I have one on my 3910 for all the reasons cited above. I can't remember where I got it, but I would imagine someplace like Markertek (sp?).