I recall a club mate using sidi mtb shoes with look deltas. He fitted a special shoeplate which was available - looked like a T more than a delta, but the points of contact were the same as look delta. Dont know if theyre still made.
I have a pair of Look leisure boots that have fittings for look deltas. Sole is soft, so no good for distance work and theyre white so look a bit Borat, but would work for the school run. Put up a wanted ad to see if theres any out there.
I also have some instep adaptors, which i reckon you could make yourself. its like a delta shoeplate with a toe clip and strap bolted on. So you can ride trainers (Ive even used them with wellies in the snow) with toeclips. Simply disengage when you want to revert to racing shoes. Again try a wanted ad.
A bicycle can't stand up on its own as it's two tyred