Do the mics terminate in a single, stereo mini-XLR, or 2 x mini-XLR (one each for L and R channel)? Which type of mini-XLR: 3-pin? 4-pin? And I assume the mic cable terminates in a male connector? (Forgive the perhaps ignorant questions, I'm not terribly familiar with lav mics and their cables/terminations.)
If the mic cable terminates in a single, stereo, male 3-pin mini-XLR, there's the
Sound Devices XL-3. I haven't shopped around for pricing, so I'm not sure if it's available for less.
FWIW, instead of searching for
mini-XLR, you might try searching for
TA3 instead.
And Norma's right -- Ed at Kind Kables and others can make a custom cable at a reasonable price, if desired or needed.