The Cooler Master Novatouch TKL was discontinued in 2016, so the second-hand market is your best bet of finding one. It did cost $180-$200 new so it was never cheap.
Topre Realforce also come in TKL variants but the regular Realforce don't have Cherry MX-compatible key mounts. Topre Realforce RGB is full-size and has Cherry MX-compatible keycaps.
I think there was supposed to be a TKL variant of Topre Realforce but I can't find any..