The Aladin Pro was manufactured by Uwatec and became VERY popular by divers about 15 years ago. Other scuba equipment brands like Beuchat were licensed by Uwatec to use their name on the Aladin Pro so to be able to sell more computers to divers who didn't know Uwatec.
Uwatec was a few years ago taken over by ScubaPro and they run the productionline of all new models of Aladin dive computers.
You may be able to get a copy of the computer by contacting them at:
http://uwatecukbeta.scubapro.com/home.asp
Personally I still believe that the old (user replacable battery) Aladin Pro air dive computer was and still is one of the BEST dive computers ever designed.