Some zords still exist, if what happened in the show happened in this universe. I'm not sure but some should. Some I think that would exist would be the dragonzord. I'm not sure if much could be done with him with no green ranger around, unless he was made sentient so he'd not need a control device like the dagger, or a new control device could be made (thought it could be captured by the enemies). I think the original zeo zords still exist since I read the quit being used and went to the new zeo zords the originals were not destroyed. There is at least 1 turbo zord that still exists, not sure of the others, since I couldn't stand to watch turbo. & the other zords that exist are unavoidable due to distance, like the lost galaxy zords (very far away) or being used by other rangers (like the lightspeed rescue zords and q-rex).
I think some carrier zords still exist. Titanis may since I think they just quit using it. The wiki says he was lost in time, but I'm not sure if it was mentioned on screen, I'll have to go and watch the episode. Some other carrier zords still exist I'd guess since some just quit being used.