you cannot buy Bogorov counting camera (can be 10-30 ml) anywhere in the World, but should ordered smbdy working with PLEXIGLAS. In India you have a lot of specialists that working in making of different figures for tourists, so ask them to make it for you. The different variant is the Bogorov-Tseeb camera (normally not more than 5 ml) for counting of micro-invertebrates and large ciliates (its schem is in my Dr's Sci. diss. in RG site) and is made by sticking of small and thin plexus stripes sticked on plate! Normally typical Bogorov camera is used for counting the immobilized or dead animals, and Bogorov-Tseeb modification for alive.
Anyway will be much cheaper for you to act this way...
you will find the Sedgwick Rafter Counting Chamber. You may ask address of Indian agent. They are having three addresses in India, i,e, in Mumbai, Bangalore and Hyderabad. You may contact any of them, which you feel convenient. Recently, I purchased from Mumbai and those are good.