I never heard of P-47s in USSR so hard to believe the logistics for either Mustang or Thunderbolt ops.
According to my Lendlease Book, the Russians did receive P-47s. I know that they received the folowing in fact (This is not a complete list of all aircraft)
5707 P-39, 2908 A-20, 862 B-25, 2397 P-40, and 195 P-47 ( I am pretty sure they were "B"s).
The Rusians also received large numbers of Spitfires,and Hurricanes (almost the entire production run of Canadian Mk Xs) and also nearly all of the Canadian Valentine tanks. They received 12000 Shermans from the US alone, and about 4000 British Tanks...almost as many as the entire German output of turretted tanks for the entire war.....
P-39s were apparently well liked by the Russians because they were cheap. A P-39 cost the Russians $43000, whilst the price for a P-47 was 0ver $85000 delivered.
Flight conversion schools were set up in both Canada, and the central parts of the USSR, so there were contingents of the USAAF in Russia, but I very much doubt they ever flew combat missions as such. There were however, shuttle services from Bari to the USSR late in the war.
No P-51s ever served with the Russians.
To this day, the finacial costs of Lend Lease have not been paid by the Sovie5ts, or their Russian successors