PROFESSIONAL PILOT LEATHER LOGBOOKS from Aircraft Spruce Europe
This one has spare columns at the end to do what you want with.
There are also a couple of small spare columns in the Jepp logbook which I have used for various things. If I were you I would buy this and write something like "SE P2" at the top of one of them and log it there.
Alternatively just log them as normal in any logbook and make the differentiation on a e-logbook software of your choice. This will most likely be the easiest way especially if you already use a e-logbook, but if you have a touch of OCD like myself then you will want to paper version to match.