There are a few brand new ones (well, 2013, anyway) called The Ecstasy of Gold, from Semi-Automatic Records. There are 4 volumes, each a double-LP containing 25 or so cuts from a variety of films. I was able to find volumes 3 and 4, which have mostly rare/obscure artists and titles. I picked them up off Amazon for about $25 apiece, but there are sellers out there asking $50-$80 or more for each 2-record set.
A quick glance at #3 shows cuts by Gori, Fidenco, Nicolai, De Masi, Bacalov, Lavagnino, Trovajoli, Poitevin, Umiliani, Laceranza, Giombini, Rusticelli, Cipriani, and a couple others. I've got about a hundred SW soundtrack CDs, and of the 50 tracks on these 2 2-record sets, 20 were ones I didn't have. I'd love to find the 1st two volumes cheaper than $50 or more.