I know of some good L-19 pilots in Texas as well as a number of aircraft. You might try the International Bird Dog Association and see if some members can help: http://www.ibdaweb.com/ - specifically: http://www.ibdaweb.com/members/resources.htm. I would personally endorse Ed Gunter as I have flown with him and know that he has a good reputation. He's a former Raven pilot from Vietnam.