SIDs is never really 'done' as it is an ongoing program. That is to say, the aircraft might be compliant at that point in time, but further inspections will be required in the future.
Further, in my experience from talking to a few engineers (as I have been looking to buy a Cessna for the past six months) is that there are 'SIDs compliant' aircraft and 'SIDs compliant' aircraft, if you know what I mean...that is to say - get any aircraft thoroughly checked by someone trustworthy before you purchase.