Hey,
Would a lav wireless microphone like this here (only the mic itself and wire)
https://www.amazon.com/Peavey-LAVALIER-Wireless-Microphone-3010350/dp/B00Q51Q9IK/ref=sr_1_6?ie=UTF8&qid=1540516300&sr=8-6&keywords=pv-1+lavalier
work with a bodypack and system labeled with a different mhz...