I Have a 1982 264 GLE which the Bosch Alternator in it has just FUBARED itself Majorly the alt warning light remains on but gets brighter as you acclerate harder any ideas?

i also got a quote here for a new replacement the same type and model one was 1,200 Yes you read correctly and 1,500 yes your not stoned :P can i use a alternator from another veichle like say a holden for example which is much cheaper and more down to earth :) also any sujestions as to an alternate alternator that uses a 1 wire setup would be helpful as id like to keep the car as much factory as i can :)

Dale.