You can either get kit equipment for receiving or transmitting, which is
widely available on line. Or you can design and build your own.

Maybe I should clarify one of my statements before someone calls me stupid.

I mean easily modifiable equipment is widely available online.
It isn't sold for Lowfer operation.

Most heterodyne and direct conversion based short wave, receiving kits can
be modified over to the LF band from 160 to 190kc

On a 455kc heterodyne receiver, push the local oscillator down to 615 to 645
kc, and put a band pass network on the input peaked to the lowfer band, and
you are done.

Same thing can be done for SSB transmitter kits that use a fixed transmit IF