Correction: what are the spool widths of the Squall 12 and Squall 15?
not sure. i have a squall 40 here. haven't seen the smaller ones. call a local shop. hopefully someone can measure it for you.
http://www.pennreels.com/products/reels/conventional-reels/lever-drag-reels/squall
I have a Squall 12. Hard to measure the actual spool in the reel but the part of the spool I can see is
1 7/16" wide or 36 1/2 MM.
John