Rossini - Andante, Theme and Variations for Wind Quartet

[TerraEpon]

So, another mystery of a piece here.

Track No. 8 from this disc: http://www.channelclassics.com/fischer-27708.html
So if anyone has this, do the liner notes discuss at all this piece?

This is a very mysterious piece. If you've ever seen the wind quartet transcriptions of the string sonatas (such as http://www.classicsonline.com/catalogue/product.aspx?pid=3341 and http://www.arkivmusic.com/classical/album.jsp?album_id=62777 and http://www.arkivmusic.com/classical/album.jsp?album_id=204255 -- you'll notice the last one shows the supposed correct title)
This piece is actually No. 6 from that collection. THAT collection was arranged by Friedrich Beer (score here http://imslp.org/wiki/6_Sonate_a_quattro_%28Rossini,_Gioacchino%29) but Beer added the piece in question as No. 3 had been left out of the original publication.

SO -- the biggest question is, where did it come from? Is it a Rossini original in this combination (unlikely)? Are they "from an opera" as the Naxos n]liner notes imply? I know it's unlikely anyone can help solve this but any info would be nice...