Maybe you should submit your maps to this forum and get them put to use.
My maps are in the game already. You can load them up right now. I made City Block(MP_City_Block), Rooftop (MP_Rooftop), and Petrol (MP_Petrol). When the latest mAAp pack released my maps got some play time but a couple of weeks later and everyone went back to pipeline. I wasted a huge amount of time on those maps for a week of playtime. It wasn't really worth it.
Have you used the mission editor before? It's not that easy to learn UE2 if you don't have someone helping you and some of the things it does are nonsensical and frustrating beyond belief.
As for the original topic question, I'm not sure who you should talk to to get the editor. It used to be Spanky but he doesn't do anything with it anymore. I'm pretty sure Eliz has it, so I'd start there, although I can't say whether they'll give it out or not.