Today i was looking for an addon to have easy access to my portal/teleport spells as a mage.
I found the addon called "Portalbox" on https://wow.curseforge.com/projects/portalbox
but as you all can see this is a Wotlk addon, adding this to my TBC install showed a green square where dalaran would be.
As i could not find any other nice portal addon for TBC, I've made a few modifications to this one so it now only shows the TBC portals, also fixed the frame so it doesn't have empty space where dalaran would be. feel free to use it, link below.