Hi Pierre
I have replaced the aileron hinges this annual, these are simple bolts. If you are after the kit (as Kristin wrote) then I can't help.
As for the Lord mounts Kristing is right, calender time is more important then flying hours,however,you have a 260C and the mounts for this model are not available of the shelf, you need to buy 2 different kits, 2 of each and use them. Note that Piper Service manual is wrong in it's description of the installation, I don't know if they have corrected the error by now or not. I know that they were informed about the mistake.
I do not have the details at this moment, but if you can't find it in the 'Tips' then let meknow andi will try to send you a scan. I have an A3 size print out of the correct installation and part numbers.
Good luck
Ben