I have had ZFs shipped to and from Wilkinson's in California (N.B. I am in central/eastern Canada). It cost under $200 each way by Yellow Freight Exact Express.
A ZF rebuild is highly dependent on what it needs. Gear sets are expensive. What I know is that an average rebuild is between $2500-$3000. You could get off less or you could pay more.
Sorry ... can't help you with clubs in Texas.
B.G.
PANTERA INTERNATIONAL
A DE TOMASO CAR CLUB
Presents the De Tomaso Forums
The On-Line Meeting Place for De Tomaso Owners and Enthusiasts From Around the World
Clicking on the banner will take you to the sponsor's website.