Chumbley, I've sent you the pics..
I thought the long protruding thing was the Brake chute holder because in my flight sims I see the Drogue chute come out from there...
bubbamoosecat,
Yup this numbering system is strange.... The platypus was indeed the ground attack version(SU32) and the SU27K was like the MiG29K a carrier version of the SU27 later renamed the SU33... But I guess the guy who I got the pic from (Venik) is a staunch Russian aviation enthusiast and hence it leads me to believe that the aircraft shown is indeed a Flounder (37) and not the "super flanker"(35)... I dont know about any official books on Sukhoi.. But you might try a huge book called "The Chronicle of Aviation". They record and put pictures of every aircraft and update names regularly...
Cheers,
Nandakumar