I bought these on Amazon as an alternate to what was posted previously to "downgrade" the power for my external mic:

https://www.amazon.com/dp/B07L42PBY5?psc=1&ref=ppx_yo2ov_dt_b_product_details

https://www.amazon.com/dp/B0B31K3FK9?psc=1&ref=ppx_yo2ov_dt_b_product_details