回答“Glass only replacement for Pixel 2 XL?”If the LCD display on the Pixel 2 is anything like the one on the Pixel, then it will be almost impossible the glass from the lcd screen. The LCD screen on the Pixel is paper thin. So, unless you have 1000s of $ of equipment and extensive practice, the screen is almost impossible to separate without breaking the lcd screen.
回答“Is there a difference between the A1286 compared to the A1382 battery?”A 1382 battery should work in a MBP 15" 2010. Both batteries are physically the same size and have the battery connector in the same place. The only difference is that the cable on the A1382 battery is longer than the cable on the A1321 battery.
回答“MBP 15" late 2008, MBP 13" Early 2011 keyboard swap?”If both Macbook's were 15" or 13" then you could swap them, provided the layouts match. You can't swap a 15" for a 13" keyboard or vice versa, as the keyboard connector is in different places.
回答“power supply board replacement part”Hi Power supply board part numbers are: 661-6048, 661-5543. I found boards available for sale on ebay and maybe available for other apple spares suppliers if you search using the part numbers.
回答“Is it possible to replace just keyboard, not whole top case?”All Aluminium Macbook Pros (inc. unibody) have removable and replacable keyboards and trackpads. Many sellers on ebay sell both parts on there own; you don't have to replace the whole top case, trackpad and keyboard, if all you want/need to replace is the keyboard. Make sure you get the correct keyboard layout to match the top case, and vice versa.