[GuidoK]

Aragosta=AST.
Aragosta is/was the japanese division of AST. (so actually it's a dutch brand and very performance/race oriented)
But I don't know if you get a 100% AST shock (and which one) or if it's a different model.
Send AST or aragosta an email. I don't know if aragosta is a real division or if it's a seperate company now. But the origin lies by AST.
I couldn't find a decent aragosta website (only japanese), but if you buy a set of coilovers you want to have good warranty and good service (if repairs/spare parts are needed).

A lot of racing shocks suppliers are dutch related (moton, jrz, ast etc etc) because of Koni. All started by ex koni employees.