Here is a low cost electric power nozzle tool kit from China.
Central Vacuum Cleaner Electric Hose/Power Nozzle
Attachment Kit contains 30 foot electric hose with corded connection, electrically activated when plugged into central vacuum wall outlet, power nozzle with head light, vinyl tool caddy, attachment holder.
Fits most homes even older installs, Nutone system will need to sand paper hose inlet tube with fine grade of sand paper to taper hose connection for it to slide into older Nutone wall outlets. Metal wands with floor brush,crevice tool, upholtery tool and dusting brush. Kits now come in black unless you request white.