Anyone using buckwheat pillow? how much did u pay for the buckwheat pillow? Any review? Where to buy it?

I have 3 of it. 2 were handmade by my mum & 1 was a gift from my mum's friend bought from some retail shops. Unfortunately, one of the handmade & the one from retail were infested by those bugs :( and we threw it away. We left we 1 handmade but the size doesn't fit our LO, so we sent for some alteration and made it into 2! We do alternates the pillow, wash the cover & sun the pillow every week.