Looking for probes - Tenma 72-540

Its the same as Sansei

Here a video that shows the probes
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The Manual is at radio Museum

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v=QePKurE0atAeum.org/r/sansei_signal_tracerinjector_610.html

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schematic in manual download

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The existing probe receptacle's are RCA style. You could as replacements use BNC connectors

You can use any small RF coax cable

Anyone know where I can find probes for Tenma 72-540.   Or...anyone know how to build probes for it?