I saw new Italian DVD releases of FAFDM, GBU, DYN and ONCE UPON ... on italian on-line shops (Videociak, DVD.It) and they're not expensive (1 disc = 9,99 €, special editions, with a booklet, 18,99 €); I'm waiting for reviews and reactions from italian friends to order them. But, as said by some here on the forum, they only have Italian audio.
Don't expect too much of the longer cut of ONCE UPON ...; the italian edit has always been longer and was already available on an older DVD which I own. It becomes by no means a different movie, let alone a better one. Some scenes last longer (for instance the opening scene), some sequences have alternative shots and one or two scenes (taken from the chopped up version from the original release in the 60's) have been included. I would order this new DVD because of italian subtitles HOH, lacking on the older DVD. That older DVD has excellent sound quality as far Morricone's score is concerned, but dialogue sounds rather muffled. Some sites mention a uncompressed PCM 2.0 soundtrack for the new DVD (others only DD), which could well be a large improvement over those fake 5.1 soundtracks we're familiar with.