One brand going for 99/pair on Amazon. Kiwee Broadband Bonded MoCA 2.0 Ethernet to Coax Adapter, 2 Pack (2 Pack) https://www.amazon.com/dp/B071ZW8N4Q/ref=cm_sw_r_cp_tai_J85GDbH92JXX2 (sorry, Reddit doesn’t seem to think this is link and so won’t let me insert it.

gocoax has a next level 2.5 MoCA adapter going for 59. I didn’t think I could get a 2.5 until recently.