where can I buy this module?

Hi,
Direct on the manufacturer's website (Ladik)

Thanks, there is no response to email. So i'm not sure it is a good idea to order.

Sometimes he takes a while to respond to emails, he does everything, designs, manufactures, etc... I have made several orders and everything has always arrived on time. On its website it already warns that it sometimes takes time to respond to emails. But everything has gone well for me with him.

Ok Thanks Ferranadsr
As I'm a newbie. is this a good quantizer (price/qualtity)?

All Ladik modules have a very good quality/price ratio. Regarding this quantizer, it depends on what you need. But it fulfills the basic functions.