I recently built a bypass looper into a Hammond 1590H pedal enclosure so I was doing some research into this. If you wanted to use jacks, and not have the LED, I realised you could use insert cables and fit two stereo switchcraft jacks and one of the small 13mm x 13mm DPDT footswitches that are avaliable.
I ended up soldering the patch cables directly to the footswitch and used strain relief gromets because I wanted to be able to fit a 3PDT switch, 9V power, and an LED indicator:
