Driving without catalytic converter

Where I live at no emissions testing. Last year shop told me I needed to replace both catalytic converters for around $1,500.00!
Way out of my budget.
Long story short, I been driving since than, without converters my vehicle drives good other than a strong rich exhaust smell.
Besides buying two new catalytic converters does anyone know how or what I can do to trick vehicle's computer to even out or to slow computer compensation of fuel. Thank you