Brought these XM4's and they came broken, Sony told me to go fuck myself so I've just been using electrical tape but it stretches over time and I want a more permanent solution

Basically thinking of 2 parts that clamp either side with 2 bolts to hold them together. I think it's important to get the exact shape as I need to put pressure to hold it down but I don't want to it to be on one point that could cause high wear / damage. Hopefully getting the right shape will spread the pressure along the curve