Been looking for pork rinds recently but Whole Foods and my local big grocery stores let me down. Then I remembered theres an Aldi near me, so I checked it out today. They have their own brand (called Clancy's) of unflavored pork rinds. The only ingredients are fried pork skins and salt. Perfect, and only 89 cents for a 3.75 oz bag. I believe the spicy flavored one lists soybean oil as an ingredient.
Also picked up some spicy guacamole. The ingredients checked out (no soybean oil) and it was 2.99 for a 14 oz bag. Just tasted it with the pork rinds and they're great. Probably can't beat homemade, but still very good.