Hello,
the one on the right kinda looks like a secondary regulator? and the one on the left looks like a argon regulator? If it is an argon regulator it can be used on co2 but you have to swap out the fitting, (i think you can get them through most welding shops) something that normally comes with an Argon regulator is a Co2 fitting. Victor Is a pretty good regulator and im sure you could get a nice price on E-bay for them, to help offset the price of what you need.
the one on the right kinda looks like a secondary regulator? and the one on the left looks like a argon regulator? If it is an argon regulator it can be used on co2 but you have to swap out the fitting, (i think you can get them through most welding shops) something that normally comes with an Argon regulator is a Co2 fitting. Victor Is a pretty good regulator and im sure you could get a nice price on E-bay for them, to help offset the price of what you need.