Does anyone know if SRAM makes a 9 speed compatible shifter for dropbars? What's the best option for shifter/derailleurs for a 2x9 cross bike?
SRAM's current lowest-level groupset is Apex, which is a ten-speed setup and Rider_X says that SRAM have never made a nine-speed road groupset. Campagnolo also only seem to offer ten- and eleven-speed, so Shimano Sora is the only nine-speed in the current line-ups of the big three.
Shimano Shifters aren't compatible with SRAM derailleurs, so you have to get a travel adapter to alter to the cable pull. Jtek Engineering makes a bunch of different travel adapters. You should contact them to see if they have a solution.
I clicked around on a few of the travel adapters, but I couldn't be sure which one would for sure solve you problem. The Shiftmate 6 looks like it might work as it says it's used for 9 speed shimano shifters with a SRAM 1:1 derailleur and a shimano/SRAM 9 speed cassette. SRAM lists a bunch of different derailleurs that use the 1:1 technology.