Casement window locks are available in TGP  product group.  Lengths are  210-280-400-600-800-1000-1200-1400-1600-1800-2000 with 22 mm backset.

The roller cams can be adjusted in order to change gasket pressure 0,8 mm ( + / -) by using 4 mm allen key.

T-20022_Side Hung Gear_Casement Lock with backset 22 mm