"coupler" approach...

1.8" (3.5mm) female on both sides...

Or you can make your own cable.

Please be careful - if you make the cable longer than 15 feet or so, you increase the risk of picking up RFI or EMI - that unshielded (unbalanced) cable can act as an antenna. That's why long cable runs dictate using XLR connectors and shielded cabling.