For purchasing gears, options include WM Berg and Stock Drive Products, which offer custom modifications. The discussion highlights the need for a ring gear and pinion for an RC car project, emphasizing the importance of material choice, particularly avoiding aluminum and stainless steel combinations due to galling. Waterjet cutting is mentioned as a potential method for creating gears, though it may result in lower precision and durability. The user is also exploring the feasibility of using timing belts as an alternative to gears, given their tolerance for misalignment. Overall, the conversation centers on sourcing gears and the challenges of machining for a beginner in the hobbyist space.