Bionik Mantis are a pretty solid fit with the BoboVR M2, not perfect but after trying 5 sets they are the best snap on option and you don't have to mod them
bionik BNK-9007 Mantis Detachable On-Ear Headphones for PlayStation VR - Walmart.com
Quest 2 Bionik Mantis Adapter by Schnippi | Download free STL model | Printables.com
Amazon.com: Bionik Mantis Attachable VR Headphones: Compatible with PlayStation VR, Adjustable Design, Connects Directly to PSVR, Hi-Fi Sound, Sleek Design, Easy Installation : Video Games
Bionik Mantis Premium Clip-on On-Ear Headphones for PlayStation VR 845620090075 | eBay
Hands-On With Bionik's Rift-Style Mantis PSVR Headphones
Amazon.com: Bionik Mantis Attachable VR Headphones: Compatible with PlayStation VR, Adjustable Design, Connects Directly to PSVR, Hi-Fi Sound, Sleek Design, Easy Installation : Video Games
Amazon.com: Bionik Mantis Attachable VR Headphones: Compatible with PlayStation VR, Adjustable Design, Connects Directly to PSVR, Hi-Fi Sound, Sleek Design, Easy Installation : Video Games