This 30 degree GoPro Hero 7 mount was designed for a Reverb Quadcopter frame from ImpulseRC, https://impulserc.com/collections/reverb/products/reverb-fpv-frame. The design has been optimised to print well with SainSmart TPU. If you have a dual extruder then you can use a support material such as PVA, if not use 1mm pillar support.
Happy to print for you if you don’t have a 3D printer…
Carefully pull away the support structures, you shouldn't need side cutters or a sharp knife...