What you could do to make life easy is get 4 plastic line clamps, remove all 4 calipers and then take the actual calipers into a shop and get them to fix them all up. Hardly any mess or work involved that way. It's not that hard to do yourself but having the right tools and space is a must for any job.
End of the day you choose as you know your abilities and how much work you want to do on it.