Customized version of http://www.thingiverse.com/thing:102974

Created with Customizer! http://www.thingiverse.com/apps/customizer/run?thing_id=102974

Using the following options:

number_of_hooks = 1
hook_and_front_thickness = 4
clip_length = 55
width = 30
hook_radius = 15
clip_depth = 25.4
clip_angle = 1
hook_style = simple
first_hook_offset = 304.8
hook_distance = 60
top_and_back_thickness = 2.75
inner_hook_buttress = 0