Repairing straight cord near handset strain relief

[RotarDad]

I've been looking for an early 500 with the straight handset cord.  Many I see on Ebay are kinked/damaged where the cord enters the strain relief at the handset end.  This seems to be the weak point on these cords.  My question is: how easy is it to work with that strain relief to hide, or perhaps remove, the damaged cord section?   I know the coiled cords slide fairly easily in the strain relief and then the metal crimp can be moved up, but I have not worked with a straight 500 cord.  Thanks for the input!  Paul

[Eman]

the straight cord strain relief is moulded as part of the cord... i was considering heatshrink tubing as a possible fix