I've just read through this thread, very cool. So here's my guess:
Ash "1977"
So 1977 is the title of that album, this fits clue 4. It was released in 1996 and the band is still active, released a record called "Islands" 2 years ago. Regarding the Simpsons clue wiki says about the record: the title refers to the year of (...) the release of Star Wars. The album opens with the sound of a TIE fighter, and ends with the track "Darkside Lightside", the title of which is a Star Wars reference, and which climaxes with a choral version of the Star Wars theme. The band also covered "Cantina Band", as the b-side to the "Girl From Mars" single.
Not really sure what 10-4 could refer to though.