Both of these are completely different. Squalls is a pilot bomber jacket. Look them up. They are a heavy non leather material. Maybe a denim of some kind. While the other character's looks leather. Also, the lengths are so far off from each other that there won't be a good looking middle ground. If you are deadset though, I'd say a matte vinyl. You can find many online. I believe syfabrics is a the where I picked out the vinyl for my kh organization coat. And the best medium might be right around the belt area. One problem though. Squall has these odd pockets that stand out that the other doesn't, ad well as the other characters seems to have a flame picture on his sleeve where squall doesn't.
Cosplay DA Regular DA
Kumoricon 2014 (so far):
-Sora (Kingdom Hearts 2)
-Alice (Hearts no Kuni no Alice)
-Black&Blue Loli-style Dark Magical Girl O.C.
-Akaito (Vocaloid. Black & Red Ver.)
Dream cosplays for now:
-Tsuruya-san (Haruhi Suzumiya)
-Kagami Hiiragi (Lucky Star)