>> only 2 (20031229 and 20040405) were publically available via the bplan website.

> i have [...] also one from morphos-storage [...] - this one 20040810

Yes, that's the one that for whatever reason bplan didn't put on their website but let GGS-Data handle the distribution by email. There were several newer versions that bplan later sent by email to users reporting problems with their installed firmware version. If you search MorphZone for the first 8 digits of the time stamps, you can find many such reports.