Riveted barrel adjuster broke. Fixable? Or need new levers?

[jumpin_jumpin]

LBS said 'eh you don't need it, pull off the one on the other side too'. So I did, but now when reinstalling the new cables/housing, there's no tension on the cables and the brake lever has no resistance.
Only thing that's different is the removal of this barrel adjuster.

 

[classic33]

Can you not get ones that will just sit inside/on the lever where the old ones were.

Have you adjusters at the other end of the cables?

 

[Gunk]

Personally that would irritate me, I’d replace both levers if you can’t source one to match.

 

[Globalti]

Or fit inline adjusters?

 

[midlife]

I guess you have fitted the correct ferrule to the top of the lever?