You can work around the limit on advance issue of the Russian visa by applying for it to start earlier than you actually need it.
For example, I got my Russian multi-entry business visa issued for the period 12th February 2014 to 4th February 2015. I knew that we wouldn't be arriving in Russia until April, but the earlier date allowed me to get the application done early and have the visa issued before I departed on the trip.
I knew that I'd be out of Russia by July, so I could have applied for it to start even earlier, if Russia was further into the trip.
I had to get the 'business visa' as my route required me to enter Russia a total of three times, which isn't possible with a tourist visa. You can use a 'business visa' for purely tourism without any problems.
Hope this helps.
2014 overland adventure to Russia and Central Asia in Land Rover Defender www.bermudarover.com