The Real Phoenix has designed a Super Nintendo/Super Famicom AV connector PCB and matching 3D printable socket, and has open sourced and released the designs for free. He also offers them for sale in his shop. The PCB is hard gold and beveled, and should be a very high quality option for modders.
AV Connector PCB: https://github.com/TRP-Retromods/SNES_AV_Connector
3D AV Connector Socket: https://www.thingiverse.com/thing:3788601 or https://www.shapeways.com/product/WC9CCGSN8/super-nintendo-snes-a-v-socket-connector?li=shareProduct
TRP’s Shop: https://trp-retromods.ca