100 AMP alternator

Hi I need a 100 AMP alternator 2 belt pulley for my 78 New Yorker Brougham 440. I can find a 60 AMP etc alternator at every part store that look factory however the 100 AMP I need and my car came with is not available that looks the same as mine dose. Anyone know where I can find a new 100 AMP alternator that looks factory. Thanks View attachment 393305