Homemade one will last ad vitam aeternam
All you need is stainless steel fixing bands and ties + vinyl hose
(an inner tube instead of vinyl hose will works as well but won't last long)
(straps are SS fixing bands)
(vinyl hose or inner tube is just for not having the fixing band directly in contact with your foot, you do that by inserting the fixing band inside the vinyl hose)





optional(for better comfort):
I've also added SS deep sockets as counterweight to have pedals always at the right position. Just attach those under your pedals with SS ties.