Hi, if you feel like building your own regulator and filter you could go with the one David made and uses on his tricopter.
This text is from Rcexplorer.se
"- L1 is a 1mH coil
- C1 is a low ESR 22uF capacitor
These two components make the LC filter and is there to remove any noise generated by the ESC’s or anything else hooked up to the main power-leads.
- T1 is the LM2940-12
- C2 is a 0.47uF Tantalum capacitor recommended to use in the LM2940 data sheet.
- C3 is the capacitor that needs to be 22uF or bigger with a ESR between 0.04 and 5 ohm"
I have made and been using this one with good result. The first one however the guy in the electronics store sold me a axial coil that had the right spec but had so thin wire that it got hot and made glitches in the video. After changing to a radial torrid coil it works really well.
Remember to put a heatsink on the transistor as it will get pretty hot when sitting on the ground without airflow.
This regulator/filter really cleans up the power to your FPV system.
If you want more info go to
http://rcexplorer.se/projects/2012/07/the-tricopter-v2-6hv/
The parts for this here in Sweden cost me about $5 and some time soldering.
Good luck