When it comes to possession of a property, as long as you desire to live there, you are obligated to pay rent. If you wish to remain in the property, your lease will likely transfer with the sale provided the new owner is an investor. If the new owner will be moving into the residence, you will have 90 days after the foreclosure sale to vacate.
First, confirm that the sale was actually cancelled. In order for a new foreclosure process to commence, they will have to start from scratch with a notice of acceleration, then notice of Trustee sale. From the date of the notice of acceleration they cannot foreclose for 121 days. However, if it has merely been postponed, they may reset it for anytime.
Contact the facility that he is located and discuss your need. Depending on the location and terms of visitation, you may be able to bring along a notary to witness his signing, or you may need him to sign a power of attorney which will grant you the authority to sign a quit claim on his behalf. Those are two potential options.
The SBA would pursue a claim for collection on a promissory note, which is a contract. For written agreements there is a statute of limitations of of 6 years based on A.R.S. Section 12-548. They are diligent at pursuing defaulted loans, however if a debt is deemed noncollectable they may in fact charge it off. However, if they are pursuing you withing the statutory period you will want to confer with a debt or bankruptcy attorney ASAP.
Has he served you? If so, I would contact local counsel and immediately seek to dismiss the matter for lack of jurisdiction. If you did not avail yourself to the laws of Texas, he cannot haul you into court there to pursue a matter against you. However, to properly answer your inquiry, details about your business, and your relationship if any with the petitioner need to be explored. Definitely seek local counsel for assistance with how to best procedural handle this matter and a quick...
The best thing you can do is contact the police and give a report. If you have sustained injuries that require medical attention or time off of work, you may want to discuss the matter with an attorney. If you remember details about the drive and the vehicle, a professional may be able to track them down via public records. Good luck.