If you are looking for a similar sound, you’ll probably want something from Klipsch. Your listening room will have a lot to say about what works best. I’d default with a Chorus I (or a KP-301 if you can find it---and if you can live with its industrial design.). Both of these are front ported, so they don’t need accommodations for the passive radiator that’s at the rear of the Quartet, any of the Fortés, or the Chorus II.
Placement is important and the Chorus I / KP-301 can go most anywhere. Your La Scalas have a big sound and are very sensitive / efficient. So are the Chorus Is.
Here’s a link to a review of the Chorus Is: https://www.hifi-classic.net/review/klipsch-chorus-418.html
Here’s a link to a review of the La Scala I, which likely represents what you have:
FWIW, I own LS, Chorus I, and KP-301. The Chorus and LPs get the most use. I also like the Fortés and the Quartets. The Quartets are the least common and least appreciated of these, but they are superb in a smaller room if placed correctly. A small weight on the passive radiator extends the bass. It has the same tweeter and squawker as its contemporary larger cousins. Paul Klipsch kept a set of Fortés in his office. You wouldn't go wrong with any of these.