The Creative Keepsakes/Social Greek Series pamphlets are still available on Ebay every so often. I searched there just now and saw the TriDelt and Sigma Kappa pamphlets up for auction.
http://shop.ebay.com/i.html?_nkw=sor...itch&_osacat=0 These books are probably out of print as I bought the KKG one back in the 80s. I was able to obtain the Pi Phi one within the last couple of years. Each pamphlet has many letter and mascot/flower/symbol designs.