Help a friend - registration issue

[aztlanco]

Friend needs help;

A friend of mine just bought a 1973 Land Yacht (25 footer) from a salvage yard here in El Paso, Texas and all he got was a "bill of sale". Now ,, he is having trouble trying to register the trailer and getting a title under his name. He was asked by the DMV (dept. of motor vehicles) and the Tax Office for a Title or a bill of sale from the last registered owner (not the salvage yard) because the trailer was registered in another state and therefore no record of ownership exists in Texas.
Maybe somebody here can help find the previous owners. The WBCC registration numbers are still visible and are # 25953. Please help and Thanks in advance.
Just trying to help a fellow Airstreamer,
Ernie
1958 Traveler, 18 ft.