Wow, that's a HARD one! lol. These things actually sound a lot like the classic horn loaded speakers of the 70's, like the JBL or Klipsch speakers. If space is not an issue for center channel, probably the best way is to see if you can get a used TLS-50 or TLS-80. There's one in ebay, local pickup only. If you search on hifishark, there are a few in Canada.
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Don't know what your budget it, if you can swing $1000, you can get a new single Klpisch Heresey speaker. The size is basically 24" high by 16" wide. I think that's about your best bet for something "new" that would match -somewhat- closely to your TLS.
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Otherwise, you could try a new Klipsch Reference center channel to get a little bit of that "horn" classic tweeter (like R-52 or RP-400 or RP-500), but it's going to have a much higher resolution and will still sound radically different than your TLS speakers.
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Don't know what your budget it, if you can swing $1000, you can get a new single Klpisch Heresey speaker. The size is basically 24" high by 16" wide. I think that's about your best bet for something "new" that would match -somewhat- closely to your TLS.
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Otherwise, you could try a new Klipsch Reference center channel to get a little bit of that "horn" classic tweeter (like R-52 or RP-400 or RP-500), but it's going to have a much higher resolution and will still sound radically different than your TLS speakers.