having trouble finding wired gaming controller with a 12+ foot cord
if you find a wired controller that you like then you can attach a USB extension to the included wired cable.
there are many extension cables that will not "slip out" due to them having a fitted attachment that squeezes the cable heads together.
you could also get a USB hub that has it's own extended cable and just plug the gamepad directly into that.
if you're rough enough with your gamepads that you'd pull it out of such a connection,
then you'll also be pulling any built-in cable out of the PC's own USB ports.
i doubt you'd find a decent gamepad that comes with such a long cable built-in.
why not a good wireless gamepad?