First Time Owner....Jayco Pinnacle or Grand Design Solitude

It's my guess that most 5th wheels that have a bed slide are using a Schwintek slide system. Schwintek is a product of Lippert so as we all know Lippert makes most every slide system out there. Like frames, no way around it. There may be another company making slide out gearing but they're rare.
It's either Lippert, Schwintek or Bal cable systems.