You seem to be persistent about this question so here goes.
Disk brakes should be easy enough, just find a new moped with a compatible front end and swap it into yours. By this I mean the front forks, wheel and probably the brake control.
Electric start is just as easy. Find a moped with electric start and a compatible engine with electric start and a good charging system and swap it into your ped. Oh, I forgot, then find someplace to stash the battery.