After much searching, I have finally come across a ut99 port of UT2k3/4's Orbital2. From my experience, I think it plays almost entirely different from Orbital1 and could be a solid addition to the map list. I recommend you all give it a look and if enough people are on board with it, I think it should be added to a few pug servers to see how it plays.
Mid
Flagstand
Flagroom
Flak/High left room
Low entrance
http://wikisend.com/download/372114/CTF-Orbital2.rar