The Ansmann Mad Monkey was manufactured by Team C and sold in Europe by Ansmann. Ansmann pulled out of the rc market and the managers of Ansmann Germany left and set up Absima. The Mad Monkey was a rebadged Team C Lupuz, the base version of the Team C TR02c. Team C still sell an updated version of the TR02c, and spares are readily available but there aren't many shops stocking parts.
Searching Modelsport for past numbers will find a lot of parts are still in shock there. Also check out EuroRC, they stock all parts, postage is very cheap and delivery is fast.
https://www.eurorc.com/category/62/teamc-tc02c--t2c