Nope. As those Estonians have seemingly 'disappeared' - including the Chief engineer, Chief navigator, Chief Medical doctor and fourth Officer - how do you prove a negative? Let's face it, these guys were in the same luxury cabins - and better still as officers - as the Voronin family and the old sea captain and his wife. The latter escaped, nul problemo, being on the upper decks and nearby all the rescue equipment. It seems obvious that being in a life boat (as opposed to a life raft) they had an excellent chance of survival. It seems very likely they were picked up by Helicopter Y64 and transferred to Huddinge, with Piht being transferred to Turku for questioning, as advised in an early Finnish quality newspaper, and was interviewed, as per a statement by Bengt Stenmark, some kind of transport and shipping minister. From there, he may have been transferred to Uppsala or Helsinki, with the Swedish intelligence services advising Bildt to cover the whole thing up and have the crew dealt with by a CIA court c/o Clinton.
Of course, the JAIC nor the press can report these guys as dead or explain how they were listed as survivors - with an Interpol Arrest Warrant put out for Piht - and seen or heard by witnesses but are now presumed 'drowned'. This is because when the whole thing is declassified after 70 years, it will become apparent that they were survivors and it won't do for the JAIC and the government to be seen to have been lying. (Although, of course, lying by omission is still lying.) So, come 2064 maybe all will be revealed.
For example, how Helicopter Y64, Kenneth Svensson, hero, did indeed rescue all of the people the early newspapers said he rescued, after leaving Berga shortly after 02:00, and not nearer 05:00, as claimed by the JAIC report (which was probably a second trip).
HS 29.9.1994