As something that might be a helpful suggestion, if you go to a less popular town, and see if you can find a nether portal in that town, as the nether is a endless generating area, if you go in to a portal that is in a place that less people visit or live in, less people might have used the portal that is there, which means it is less likely that it is little resources around :)
I would suggest going to my town Flintwood, but it is set to private at the moment, and I have no time to go on and change it, you would have to do some walking to get there, but I can guarantee that it is glowstone and quartz thru does portals :)