From the Ashes
 

College fraternity returning to campus. Would love to help recreate the walls with old composites. Any ideas?

Are you in touch with the alumni? See if any of them still have their old individual composites. You may be able to have them blown up to wall size.

Yearbooks
 

While often not in the same format as composites, Yearbooks often have both group pictures as well as individual pictures of all of the students. You may be able to recreate the composites from the yearbooks or at least display the chapter group picture.

Also talk to the University archives to see if they have any ideas. Sometimes they have really good scanning equipment/software or at least recommend a place that does so (They get *really* twitchy about removal from the archives under non-controlled situations).

Those old composites might have been stored by a local alumnus, or turned in with other chapter stuff and ritual equipment to the fraternity's headquarters.

And to bring together both my post and the one after it, the old fraternity composites might be stored at the school archives as well. Theoretically with a large organized Greek Office, they might have kept them, depends on how long the chapter has been inactive. And oddly enough, check eBay...