I have a 2009 Gas Gas Raga Replica 300 and it has this Sachs rear shock that is "non-rebuildable." I would like to replace it, but Trials bike parts are not always so easy to find in the USA. Trying to find a replacement shock has frightened me, as I want to buy a new one, but they are expensive and I do not want to buy the wrong new one. Am I over thinking this? Can I buy any shock for a Trials bike and slap it on the ole' Raga? Or do I have to ensure I find one with the exact length eye to eye, and exact diameter of "eyes" at each end specific to the 2009 Raga, and if that is the case where can i find that?