Swap two weekend motorhome tickets for one settlers motorhome ticket?

Struggled to check out this year, probably through panic, and the settlers motorhome ticket that was in my basket was lost... Nightmare as all our grown up kids and grandchildren are going.  Anyway.  Now I have two motorhome weekend tickets - but want one settlers motorhome ticket instead.  Anybody want a straight swop - 2 for 1 ?  Perhaps suits someone who can't go for the settlers - then you'd have a spare to sell on - or someone who'd like to bring someone along with them in 2 vans?

Fingers crossed