https://www.al-ko-secure.co.uk/will-it-fit.htm
Look here shows the receiver as part of the hub and you can check if you can fit a secore lock to chassis l did a quick look and sterling isn't listed.
Link not working, Cliff ("l" missing after "htm").
Try this link Mark, although as Cliff says, your 'van doesn't appear to be listed.
Hang on! "Manufacturer: Swift
Year: 2011
Range: Sterling Europa
Model: 550
Manufactured Between: 1st September 2010-31st August 2011
Wheel: Storm 14 inch
This is the wheel you should have on your caravan:
Please check to ensure this is correct.
If you are unsure - please contact us using the option below.
Please find below the three* variants of AL-KO Secure available. Not each will be available for your caravan.
AL-KO Secure Compact:
Order 1289487 online at www.alko-tech.com/uk or via your Dealer [Insert no 25] "
So I found it under swift it's a no 25 insert so you should have a receiver as I said it shows that it is on the hub, if it's not there then the only explanation is that it's been broken off in a theift
So I have the number 25 insert and lock, what I don’t have is the bit behind the wheel, I understand that AL-KO approved dealers can fit them, for instance if you buy a new caravan and request that as an extra, saying that, surely a caravan breaker would have AL-KO chassis’s with one fitted that could be removed.
Like This https://www.primaleisure.com/product/1140116/alko-wheel-lock-receiver-ns-only
I believe you will find that it was only Dealer Special models that were factory fitted and came with the complete wheel clamp and lock as our Dealer Special was.
------------- 2023 Swift Archway Woodford, MK3 Kuga ST Line X 190 ps AWD Auto
Now 52 years Caravanning completed.
A colleague had this exact same issue with his second user van. Despite the van having the later chassis, alloy's etc., the receiver simply wasn't part of the original spec unless specified as an option at point of order.
Both he and looked into the availability of the receiver, which does fundamentally bolt on, but it seems the supply to the public has been restricted and they're now only available through a dealer fit.
I think maybe a search through breakers might be the most cost effective option for you.