Looking for both rear shocks on a 2007 Polaris 600 Touring IQ Sled. Front torque arm shock is Polaris Part Number 7043207 but has been discontinued. Rear track shock with the accumulator shows a rebuilt kit part number of 1500703 but it has been discontinued as well. Any suggestions on aftermarket shocks and where to buy? Or anyone out there rebuild them? Thanks for your help!