Does a left-behind parent in Russia have a chance of getting a child abducted to Israel sent home- has an Israeli court actually made such an order?

Yes! For example in September 2018 Ashdod family court ordered a mother to return an abducted child to Russia within 7 days,and held that if she did not do so, the father could come and take him back.

Hague Convention Countries

The “Hague” countries that are bound by the Convention in relation to abductions to and from Israel are:

Andorra | Argentina | Australia | Austria | The Bahamas | Belarus | Belgium | Belize | Bosnia and Herzegovina | Brazil | Burkina Faso | Canada | Cayman Islands | Chile | China | (Hong Kong & Macau) | Colombia | Croatia | Cyprus | Czech Republic | Denmark | Ecuador | Estonia | Falkland Islands | Fiji | Finland | France | Gabon | Georgia | Germany | Greece | Honduras | Hungary | Iceland | Ireland | Israel | Italy | Japan | Latvia | Lithuania | Luxembourg | Macedonia | Malta | Mauritius | Mexico | Monaco | Moldova | Morocco | Netherlands | New Zealand | Nicaragua | Norway | Panama | Paraguay | Peru | Poland | Portugal | Romania | Russia | St Kitts and Nevis | Serbia and Montenegro  | Singapore | Slovakia | Slovenia | South Africa | Spain | Sweden | Switzerland | Turkey | Turkmenistan | United Kingdom | United States of America | Ukraine | Uruguay | Uzbekistan | Venezuela | Zimbabwe

New countries may join the Convention in the future so that it applies to abductions between them and Israel, if Israel accepts their accession.