Hi, I assume you mean the lock, when you write barrel. You should be able to buy a new lock at 1010security:
https://1010security.com/s2-7-42.html They are usually dealing with professionals, but I assume they will help you with a lock. The key might be to short, but maybe you will find a locksmith nearby who makes a copy of these keys on longer blanks.
Another option could be to reorder the tumblers inside the lock and get keys for this, but this requires a more skilled locksmith and more effort and work.
And you might be lucky and find a replacement lock on ebay, e.g. this one:
https://www.ebay.co.uk/itm/401784811201 They have as the fourth image the dimensions.