If you can not find the size you need you are looking in the wrong places.
Go to your local locksmith shop. They will either stock the size you want or be able to order it for you.
Best advice get one to British Standard EN 1303:2005
The Yale version is available from 25-10-25 up to 55-10-40 the first number being the anti snape side.
DC
Teamlocksmiths
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