There is a good chance that the "eastern European" MiG-29s were Czech. They have a long history for cooperation with Israel. I was a member of the USAF Air Attache/MLM team in the second half of 1994. We visited a very large hangar at Česke Budějovice in which all of the Czech MiG-29s were parked. They later traded them to Poland for helicopters. When Czechoslovakia split into two separate countries, the Slovaks got the only MiG-29 UB and all the spare part kits. The Czechs didn't have any money left (so they said) to buy new parts kits, so they hangared the MiGs there at Česke Budějovice until some deal with someone could be made. Thats where my money would be as to that training and possibly even their final receipt of the 29.