Jan,
There are definitely others on the www.nahip.com website.  This is a busy time of year when folks take vacations so perhaps that is why the delay.  It is always a good idea for business owners to leave a detailed message on their voicemail if planning to be out of the office so they don't lose business.

Perhaps you can form a relationship with some others in various parts of the state since Texas is such a large state, this way you can provide referrals and they can provide them back to you when necessary.