Quantity   Component name
2 × Hitec Servo HS-805 MG https://hitecrcd.com/products/servos/giant-servos/analog-giant-servos/hs-805mg/product
5 × Bearings (just any 608 bearings will do, but this is the ultimate one, i think:). https://www.skatehut.co.uk/bones-swiss-bearings-ceramic.htm