Toyota is your best bet mate NO motor factors sell them unfortanlty mine for my na cost £50 so can imagine same for your glanza Could also try id-workz James
I know so many people on the list and only us turned up Ohh well lol Maybe next.time will have a better turn out on the plus side at least some boost power turned up
i have no idea if these are the right ones but i took pictures of my front and rear speakers to see if they are the ones you want hope this helps mate james