hi guys i need some help here im using a tire-safeguard monitoring system on my truck and trailer tires. some of my monitors are taking long naps now and not working.i deal with a guy named Dion in Cerritos ca. i haven't been able to get a hold of him. not sure if he is still in business.to bad he was a nice guy to work with. anyway any of you using the tire-safeguard system. who are you dealing with? thanks for all your help