Laser Unit for Sony CDP-991 CD player

Please can anyone tell me where I still can buy a complete laser unit for a Sony CDP-991 CD player ? Does somebody know some tips to repair or clean this unit ? The actual problem is that the CD player don't detect a CD in the loader, the only noise that it reproduces is some ticking ... Thank you for willing to read my message. Friendly regards Carl.
You are probably going to find that the parts and labor for this repair will be more than the unit is worth. Suggest you buy a replacement. thanks, ph805.527.9739 fax805.527.9808 eCatalog available. New equipment demo’s by appointment. All quotes are good for 30 days. Customers in every state, & 26 countries (angol/ingles/englisch/beszelunk magyarul!/ hablamos en espanol/wir sprechen deutsch).