Let me know if you would like me to go and take a look and send you a brief report on my findings.
Its a 3,000km round trip so I would need some help with petrol money and a few nights accommodation.
Drop me a line and I'll send you a payment request for £100, then I'll hit the road to the Volga District, take pictures, some yield measurements, chat to a few locals and write up a brief report within a day of the trip.
It'll be cheaper and quicker than organising a visa, popping one of your guys on a plane, finding a translator, hiring a car and paying their expenses.