I only have the two EPs, but I agree with you about Fluidtrance Centauri one. It's mindblowingly good. I saw their video on a 120 Minutes special from Prague (I believe?) back then and immediately went out and bought the EP (well, I had a freind do it in Stockholm for me, because I couldn't find it around these parts). The AstralaVista EP on the other hand was a major disappointment IMO. The mixes are far away from the lush and dreamy beautiful sound of their first EP. I never found the album though - and after a while I gave up and haven't looked for it since.

There an old discography (with soundclips) here:

http://www.hyperreal.org/music/exclusive/discogs/ecstasy_of_st_theresa/

But their management (from what I understand of the language) have entries all the way to 1997 (mentioning Go!Discs in 97 as well - well, Free Records is a sublabel to Go...):

http://www.multimedia.cz/cgi-bin/toISO-8859-2/D_Smack_U/eost.htm

One website (updated in 1997) says:

Currently, no Czech acts have made it beyond the border, though Ecstasy of St. Theresa raised hopes when they secured a Peel Session and London indie chart placings in 1993. It's hard to see how the scene will develop, given that most Czechs would rather have a ticket to REM than any of the homegrown offerings. The major record companies have set up offices here, but they're more interested in exploiting their western back catalogue than in signing local talent.