Vacant property - owners unable to locate trust document - SoCal probate/estate planning referral?

[Jenna Y.]

Hello - Trying to purchase an abandoned home - the house is owned by a trust, the owner passed away 15 years ago. We are working with the family to acquire the property. Our escrow company needs a Trust Certification for escrow.  The family contact doesn't remember where the trust document is located anymore. We did a prelim title report and there is no recorded trust. We will continue to dig of course, but what is the recourse if the document is in fact lost? 

Estate planning/probate attorney referrals also very welcome (if that's the appropriate thing). This is a very small deal (especially for California standards), but hopefully more down the pipeline. 

Thank you!