Try Suburban Physicians, Houston…281.679.5600…they do the UKOOA and being in Houston if they do not do the OLF they may be able to tell you who does, if anybody.
I looked into this a couple of years ago and found that no one at that time would certify the OLF (La-Texas).
However, it should be pointed out that legislation has changed (Nov,07) and the UKOOA is now accepted in Norway ( Netherlands to follow apparently) but that unfortunately has not translated to all Noggy companies getting with the times and some still hold on to their OLF cert.