Here's one that is far cheaper to make yourself:
https://www.youtube.com/watch?v=Kv72UHO-0c8
Type: Posts; User: Phonontronics
You can make a cheap DIY shredder for plastic out of wood & washers etc.
Here's one that is far cheaper to make yourself:
https://www.youtube.com/watch?v=Kv72UHO-0c8