AL-KO Secure

Perhaps you could identify the wheel used on that specific caravan and check which earlier models used the same wheel, and hence discover the appropriate lozenge to use.

I am sure you have good reasons for choosing an Alko lock but have you tried using one? If so apologies and disregard the following. I had one and found it difficult or fiddly to fit and changed to a  Milenco Wraith which the insurance was equally happy with. I know many say they find it easy and you may be one of them? Just thought I'd mention it just in case.

Go to the AL KO Secure site and then "Will it Fit" -  it again only goes to 2020 but there are clear pictures of the wheels for each van listed so you should be able to determine if the 2020 insert number will fit your van.  As per cornersteady  best used on a van with a mover as lining up can be fiddly.

Am I allowed a +1 🙄🙄🙄

Mine's a twin axle and aligning both wheels to fit both Alko locks is a pain in the proverbial. 

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It is no trouble to fit the Alko locks on a twin axle with a mover.  I do it often enough. Even with levelling blocks. Details on request.

If you  are lucky to have your caravan at home with plenty of space then yes I'd fully agree but at our storage we have to be within a set bay, good enough distance sideways, but a closer set distance back to back with the caravan behind and as such some can't near enough to align the holes using an Alko unless a lock and level is used.  

I've also found it's far quicker with a Wraith as no putting in and aligning that special bolt to unscrew the threaded bolt, and the large bolt can go through any hole in your wheel, but as I said some find it easier than me.

Post edit, when people can't get close enough the storage owner suggests taking the caravan out and doing a 360 right hand turn with their mover - it appears to work.

+1 

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I wouldn't say it's 'no trouble' but I CBA when I last parked mine at home consequently, at the moment it's just fitted with a Bulldog Max until I can be 🙄