Try this scale (spanish gypsy = or atleast that's what it was called when I saw it last)

1 2b 3 4 5 b6 b7

for the key of C it'd be

e |------8---9--------------12----|
b |------8---9---------11---------|
g |----------9---10---------12----|
d |------8-------10----11---------|
a |--7---8-------10----11---------|
e |------8---9---------------12---|