I'm currently in China, and I like to keep half an eye on Baopals (the Chinese Amazon) for Playmobil. Usually it's real stuff and very expensive.
However, there is now a seller selling body parts, and the occasional accessory. To be honest, it's still not particularly cheap (I think to build a figure would be about £3-4, so as expensive as the real thing), and I've never custom made figures anyway and was worried I'd forget to order something crucial.
My curiosity was piqued and I bought a few hats.
They're much shinier than real Playmobil. Most of them have a noticeable point where they've been attached to a mould, but they fit OK and I will probably find a use for them somewhere
https://www.baopals.com/products/593389021547?skus=1627207%3A4875525410&skuId=4155395185394