Substitute for modified starch

Hello! I am going to try to reproduce the recipe for a vegan pudding I normally buy at the store (but that for some reason is getting really hard to find near me) and looking at the ingredient list, the only thing I am unable to find is modified starch. To make the recipe at home would it be reasonable to just use corn starch? I considered using xanthan gum, since this is also a thickener I could find online at a reasonable price. The original recipe in vegan but I use dairy and eggs to bake so the substitute ingredient can contain non vegan ingredients. Thanks! submitted by /u/glass_eyed_nun