How do I locate living trust funds?

You really have time running out for you because if these are bank accounts, banks only keep records for a certain amount of years but even less if the accounts are dormant. The bank can then close the account and escheat the money to the state. Try to look at missingmoney.com or the Texas State Treasurer's office to see if the monies have been considered abandoned and escheated to the state for a certain of amount time. Keep checking every single bank in Texas and credit union and trust company. Check with the IRS and see if any interest has been reported to the IRS on these accounts. Not much else can be done.