I just changed my A1297 model Late 2011 MacBook Pro 17" battery using a NewerTech battery kit (includes the two tools you need) that I sourced off OWC (OtherWorldComputing aka MacSales website) and using their installation video (while checking it against install guides on EverythingMac and the iFixit websites) The replacement went without a hitch and the battery is charging now The only thing I had to do was reset the clock after boot up I will report problems here, if any But if not, then Finito!
see my pencil eraser solution above if you really want to buy rubber feet you would probably source "isoprene rubber feet 8mm x 3mm" on eBay Closest thing I could find although I never bought them You wold still need to superglue them on as the original feet were custom designed and made for Apple
THE COMMON PENCIL ERASER SOLUTION: Rubber feet specification is approx 2.5mm high x 8mm wide So I used two 2.5mm thick slices of WHITE pencil eraser (these are a little less than 8mm wide, but oh well, so they don't fit the hole exactly flush) and just superglued them to the metal showing thru the back cover hole It worked perfectly and left the trackpad even on the desk (Slicing technique: I used really sharp Exacto knife (make sure you are slicing flat, not at an angle --- i.e. when you are slicing using a very slight sawing motion, do not push down too hard on the knife or the slice comes off a bit angled due to the flexibility of the rubber eraser). If I lose one, I'll just cut and glue another one Cost = 0 if you have this stuff around the house Time = 5 minutes, not including hunting down the stuff I needed