Paid campsites at MotoGP lemans

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Hi all, I know this has been covered before, but I’ve just spent about an hour trying to find it and I haven’t been able to. A bunch of us are going this year and we want to be close to La Chappelle ACO hospitality area and I think that means panorama or Rouge camping sites. Our problem is that these seem to be paid tickets, only i.e. not included in the general admission ticket prices like the other campsites are. But there doesn’t seem to be anywhere that I can find to actually buy these tickets, so does anyone have a website link to where I can buy?
Or can generally advise on where to camp that’s close to the ACO La Chappelle? Thanks very much in advance cheers