Actually, Ian Curtis and Rob Gretton produced three tracks at Cargo Studios for Section 25: "Girls Don't Count", "Knew Noise" and "Up to You". This was the first Section 25 single, released in July 1980 with Factory number FAC 18. These songs are bonus tracks in their first album "Always Now" re-released by Les Temps Moderns.
In fact Les Temps Moderns released all Section 25 albums in CD format. They sound like a raw Joy Division in the first two albums "Always Now" (1981) and "The Key of Dreams" (1982). "From The Hip" (1984) is a turning point to a electronic oriented music. Produced by Bernard Sumner this album features magnificent tracks like "Looking From a Hilltop" and "Inspiration". Produced by the band themselves "Love and Hate" (1988) is another good album. "Deus Ex Machina" is a compilation of live tracks and demos between 1983 and 1985. "Illuminus Illumina" is a CD of early material plus 1980-1981 jams and early live recordings. There are also live albums like "Live In America & Europe 1982" and "From The Hip In The Flesh", a live recording from the band's North American tour in January and February 1985.
You can find more info at Section 25 official website and if you are interested buying their albums you can try Opal Music.