Aramaic Lexicons

[Gentile]

I am quite appalled at the absence of decent Aramaic-English Lexicons. What is up with that? Orahams is based on modern Aramaic and isn't indexed according to 3-letter root like a lexicon should be, and the good Thesaurus Syriacus is in Serto which is the worst script. In fact it bemuses me that scholars in the West seem to be so keen on the Serto script. Why? It is by far the hardest to read. Why not one based on Ktav Ashuri, Estrangelo or Swadaya that is technically sound?