chop off a few toes and wear womens shoes
I have a Hunter Cobra and am using the Wilwood three master cylinder dual pedal setup. There is no room for wide shoes so cross trainers are out. The wilwood dual pedal setup has the correct spacing on the pedals so you need to start from the left and work out the gas pedal as far to the right as you can.
Does your cobra have a inner liner on the left side of the foot box? If so you might be able to remove part of it and open up a little more room for your clutch pedal. Many cobras have just the outside of the body for the inside of the footbox. My cobra has a thin piece of plywood covered in black vinyl and I have thought about cutting off the part next to the clutch pedal and gluing carpet to the inside of the body/footbox.
Cobras are not made for people with big feet or bodies.