I am sorry, I did not read the first portion of your sentence. I only responded to the Phase I or II issue.
I opened up the RR locations and found four sites near South Houston. One of these was the Houston SE simulcast. One was in Pasadena. I don't know what radio you are using, but I would plug these into your radio unless you are using a radio that does not pick up Phase II. The Houston SE Simulcast won't work on a Phase I scanner from what I understand. I am quite certain if I have misidentified something, there will be someone out there in RR forums to correct me. LOL.