Your best bet would likely be to buy a 4-pin XLR connector, 1/8" and/or 1/4" TRS plug, and some cable and have someone knowledgeable with your requirements terminate the connectors in the desired configuration.
Be careful though, if the parts you're looking for aren't sold by anyone it usually means the equipment isn't intended to function in that method. That's not to say it won't work, but be careful with kludge type solutions!