All three of my questions answered by funaiservice.com on parts that can be ordered directly from Funai.
* * * * * * *Q1. SATA Adapters?
For the Philips unit he needs to contact P&F* 866-321-3927.
For the 2160 and the 2080, the adapters are not available.
Same PN 1VSA20684 for 2160A, 513 and 515.Q2. Recovery Tool/Disc for "Downdated" FW Install? (Older FW Not for That Unit)
He cannot repair the firmware problem.
He can order the DVD mech and CBA however.
This is where the firmware data is stored.
The part number is N78F0FUN** and that part is available for $67.99.Q3. Is ALL FW on DVD CBA (PCB) or Is Some Elsewhere?
Yes, all FW is on the DVD PCB.
* * * * * * *
*P&F = Philips Funai.
**PN for 513. See other DVD/CBA PN's here.
All same price: $67.99.