My team is using the 2010 Russian Census and we'd like to have polygons that correspond to these population values. We're flexible to any sort of polygon format (shapefiles, GeoJSON, KML, etc). However we'd like low-level administrative boundaries, probably at the 'district' level.
We're currently using polygons from OSM, but would like to try polygons officially associated with the census (like the TIGER files are associated with the US Census values). I imagine these files exist somewhere internally within the Russian Census organization, so the staff can associate the right people with each administrative area.
Are these files publicly available? If not, what is the best alternative, or where should we look? Our team has a few native Russian speakers, so the material can be in Russian.