In terms of general central European suppliers I've had good experiences with the following suppliers delivering to Italy.
RS Components (free shipping over €50)
Digikey (also free shipping over €50)
Farnell (limit of €80 for free shipping)
One thing to bear in mind with Pepper is that many of the components are quite standard parts so as long as the value is matched you can replace for a standard component (resistors, capacitors and headers).
Also, this is not ideal for EU customers as shipping from the UK, but Thonk still have 5 full DIY kits for Pepper in stock. This comes with everything you need to build the module including the Bela Starter Kit, PCBs, Faceplate and all the components aside from the USB connectors https://www.thonk.co.uk/shop/bela-pepper-kit/
I will have a look for some other suppliers for the USB breakouts. These are a pain to source. We have considered buying a bunch of them and offering with the Pepper kits on the shop.