The Zeiss DT3/25/35 is based around the quite common 384x288 17um VOx just like the little variant of Leica Calonox (Sight version).
Here in Denmark the DTI3/25 & 35 goes for 2550 & 3125 euros, so a tad cheaper than Lecica's Calonox Sight variant which is around 4000 euros for the corresponding 384x288 17um variant.