Early-mid 90's serpentine alternator bracket?

I've got the alternator/ps pump bracket that fits the smaller size alternator and have been trying to find a bracket that allows for the larger alternator.

smaller alternator bracket (this picture is one that's converted using aftermarket brackets to fit on a big block but the bracket is the same as the one I have now):
http://i121.photobucket.com/albums/o219/ernestmayhand/Caprice%20resto/alternatorbracket.jpg

Larger alternator needs different bracket (note the mount positions are in the 180 degree area where as the smaller alternator mount points are closer to the 120 degree area):
http://static.summitracing.com/global/images/prod/large/sum-g1667a.jpg
yes I know this is not a serpentine alternator but it's just an example

Anybody know what I need to look for for to find the bracket I need? Was there an option for a larger alternator in the early-mid 90's trucks or suburbans that would have the bracket I need? Am I looking for something that doesn't exist?

I haven't tried it on my truck, but you might try the brackets from a 9C1 (police package) Caprice. They came in two flavours:

a small adapter arm that attaches to the small alternator/ps bracket
an alternator/ps bracket specifically made for the large alternators

I have both set-ups although I'm currently using the adapter arm on my 91 Caprice. What I did find was that one of the large alternators I have, which is the one that came with the bracket specifically made for the large alternator, will not work with the adapter arm set-up as the alternator has too large of a diameter so it fouls at the section above the ps pump and can't be dropped enough to be bolted to the arm. All of my large 9C1 alternators are Delco's, so the problem isn't a cheaply cast housing made out of tolerance.

The bracket that I think you want to use is Part # 10077589. I have one that I plan to use on my changeover from '89 to '90 brackets.