I think you'll have to have one built custom for your purposes.
Classic Stand N spray are designed for water based liquids. this mean the body of the pressure vessel, the internal diameter of the pipes, the pressure rating are chosen to work well with liquids as or nearly as viscous as water.
Vegetable oil is significantly more viscous than water. As example, olive oil @68F has a viscosity of 84mPa*s, where water at the same temperature has a viscosity of 1mPa*s. https://physics.info/viscosity/
In order for vegetable oil to spray, you'll need to raise the pressure and temperature inside the vessel, far above to what I would consider ''safe'' in a plastic stand N spray.
Hot oil loves plastics and it will infiltrate through and softens it, (even teflon has limits!) leaching plastifiers and staining it. Cleaning and sanitation will be a nightmare.
So yeah...look for one made out of stainless steel just to be safe!