Collecting Old Combo Orks Books

I've collected old sheet music for a long time -- mostly looking for music that will benefit me as a player in some capacity, either through methods, arrangements, or any other written means. I've got tons of obscure songbooks and piano music, books on improvisational concepts from the 1920s, method books by some legends, and much more. I'm trying to close out one of my many collections -- Combo Ork books. A mainstay of the 1950s, these books gave you a full arrangement for three horns and rhythm on one page, and about fifteen tunes in each book. You don't see products like this anymore, but I'm trying to get a complete collection of the Robbins Combo Ork books. I've got most of them, but I'm missing an Eb book for No. 1-4; Bb and Eb for the Waltz Favorites, Mamboettes and the Gem book. I'm also discovering multitudes of other publishers, but I'm trying to stick with what I know. I did find Latinettes from the same publisher as Mamboettes, so I guess I'll have to jump in to the bidding. Let me know if you know of these books or others like them -- I'll gladly trade PDF scans from my existing collection, and I'll be posting more on my other sheet music collections. For now, here are some cover scans: