I recommend ABS or Ultion although there are others, need to be TS007 3 star diamond rated, buy through a locksmith/ironmonger and get them keyed alike, probably won't be cheap though
They can be key-aliked, but don't seem to come in thumbturns. I also have thumbturn, key-aliked Yale Superior locks, but they are only 1 star, but that's OK with a 2-star handle?
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