Piaggio Skipper new lock?

Hello,

I have a Piaggio Skipper ST 03' reg. Unfortunately, I lost the only key I had. I don't have the red key for it either.

I know that I will need to get a new CDI and lock set for it. However, instead of buying new, I was wondering whether or not I could buy a second hand CDI and lock and install it without any problems? I have managed to source one of these but it also does not have the master key but does have the service key.

Any help will be massively appreciated.