An 058 should do the trick but you'd have to get hold of the accessory levelling plate. The Manfrotto one isn't cheap but the Gitzo one will make your eyes water

With the 058 you'd have a centre column and also quick adjust legs where they lengthen / shorten by moving some lugs at the top of the tripod where the legs meet - it saves you having to reach down each individual leg with the potential of overbalancing the camera.
If you want a built-in levelling head, I guess some of the Gitzo range include it (I know they have levelling centre columns) and I'm sure there'd be one sturdy enough for the P2.
Other options are the Berlebach Uni range, models 6 to 26 as these have built in levelling. The 'lightest' one will support 30kg

There's always Ries from the US - good but known to be heavy and expensive and there's probably others but this was a quick answer...

Andrew