Not sure if anyone still needs or is interested in one, but I have probably 30 of these (maybe more). They are 3 pin connectors (no 5v line) on each end with the TX and RX already swapped. About 20-21cm long. They were well for a UART cable between RVR and Pi.
I am not conveniently located (a geographical oddity. Two weeks from everywhere!) but, if anyone is interested, I will put one in an envelope and mail it your way. I might be able to get some sent out over Mardi Gras break. If you’re patient postage-wise and you want one, message me a mailing address in the US and I’ll do my best.
Pase yon bon jounen!
Scott Bridges, N0SAB