The Chinease J11 cannot be exported .. Russian copyright issues
China can only export its own indengious fighters JF17 or J10 or earlier model J7/J8
Events comes and go by time and it's all about changing scenarios in international politics and diplomacy, nothing is forever. If Indian can lean towards US then in this rapidly changing alignments, why not Russian can thinking about Pakistan (getting distance with US in relations, which is more in Russian favor) we cannot forget the recent deal "(1) Mi-35M attack helicopters" which was 4, too small in numbers, even then India tried to stop it.
Currently it will not be ease for Russian to deal with Pakistan directly due to few Russian and Indian partnerships ongoing projects (The more financial aspect) including FGFA.
Why not Russian can give permission to Chinese to sell J-11D to Pakistan? In any ways haven't we have these copies of Russian fighters flown in Pakistan before. If India can make TOT deals with purchase with France for Rafael, another French multinational aircraft engine maker SAFRAN helping India for Kaveri engine. SAAB is also seems willing to do it (2).
Why not Russia and China. India madly buying everything. The technology is changing rapidly anyways, you never know what going to be in next 5 to 10 years.
India is using and they are working on for TOT for SU-30 (3), how came it will be ease for Russia to sell SU-35 to Pakistan? India will block the deal any way, but they cannot stop China to sell J-11D to Pakistan. On the other hand for Pakistan, Chinese relations are more reliable then Pakistan, Russian relation (just in case). Pakistan and China if work together to get it work it will be a working option. Russia has given us JF-17 engines through Chinese efforts. Same thing here goes here too.
Pakistan is getting technology any way form the world e.g AESA radar and many other for F-17 Block III. Hopefully a mix of Russian, Chinese, South African + Turkey do the math for us. This seem to be a quite smart move.
(1)
http://thediplomat.com/2017/08/pakistan-receives-4-advanced-attack-helicopters-from-russia/
(2)
https://thewire.in/172643/adani-to-...as-10-billion-single-fighter-jet-competition/
(3)
http://www.indiandefensenews.in/2017/04/indias-mod-reveals-which-private.html