I believe each member had to purchase their own rifle, and the group made a mass purchase. I'm sure David's book has info on them, I've got a bit - 803 rifles made. How many still exist is unknown, you'd have to find them all and see which ones have been sporterized, mangled or rusted beyond repair.

“The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at www.savagelevers.com