maybe contact this place
I got a couple of quotes from a couple of folks when my 128 needed a new laser, Quest and USA Tube for $400 and & $450 respectively. I originally bought it from Quest. That said I had it repaired by a local service center where I live (Paradyme in Sacramento) for a lot(!) less including an extra replacement laser (Sony). I don’t know where you are but this work is not rocket science, best check around in nearby areas before you start using strangers. FWIW.