Not sure I'm that 'handy' to create something like that, HV!

What I try to do is just walk barefoot or put my bare feet on the ground while I sit out in the sun. That's free enough!

But I haven't been very consistent with that yet!

There really is not much too it.  Simply take the conductive foam pieces and cut them lengthwise about an inch or two wide.  The width is not that important.  Sew the ends together to make a piece that will fit all the way around your ankle.  Sew some Velcro, the male on one end and the female on the other so the Velcro will hold the foam to the skin when wrapped around the ankle.  Now take a length of single strand wire from some phone wire.  Cut it long enough to go from a ground such as the screw on an outlet plate to where you will be such as bed or sitting at the computer.  Strip the casing off both ends of the wire about 1/2 inch.  Push one end in to the foam and glue it in to place.  The other end of the wire is connected to an outlet screw.  Just loosen the screw that holds the outlet plate on, bend the tip of the wire in to a "U" shape then put it between the screw and plate and tighten the screw.  That is all there is to it, you are set to go.  Just wrap the foam around your ankle and fasten the Velcro.  The foam is conductive and the screw goes to ground.  Therefore as long as the wire is connected to the screw and the foam and the foam is in contact with your skin you are grounded.

The foam is a couple of dollars.  The Velcro another couple of dollars.  The phone wire probably $3 for 25 feet.  For example you can just buy a 25 foot phone cord and cut the ends off.