Intervallo have announced they plan to reissue of all seven of these, but I imagine tracking down the source material must be about as hard for them as it is for us. I am very, very happy with what they have done this far, and really hope they get around to the remaining four.
... 'til then, I'll just very kindly second this request, though!
Not to downplay his involvement, but I think the 'main' guy behind these was Tommasi, not Alessandroni. One can only speculate, unfortunately, but I think the writing credits on these are about as, let's say "dishonest", as the label structure, with many names and aliases being used to conceal and 'inflate' what was most likely a small team of writers.*
You may be interested to hear that we've since learned of
several other labels under these publishers, mostly thanks to the continued passion and research of
MillionDollars.
You'll se there's a different batch of releases here in a similar style, centered around Nora Orlandi and a small team of writers including two Di Biagio-s and Guido Podestà, a central figure at RCA Italiana.
* Again; speculation, but it's not unfair to assume that in addition to those credited to himself and "Braen", tracks credited to Alessandroni's wife Giulia (including alias "Kema") are actually penned by the late maestro. Similarly, one can speculate that those in addition to tracks to his own name and aliases "Atmo" and "Konnell", those by his (ex?-)wife Silva Savigni (with aliases "Jarrell" and "Mantissa") are by Amedeo Tommasi, as well as those by Umberto Santucci ("Montedoro"), Marco Di Marco and Leandro Piccioni ("Pilean")... and so on.