You will find Kar98a barrel bands on trash bins on tables at the big gunshows. No one knows what the bands are and what they are for. So you MIGHT pick them up for a song. But, you must beat the bushes and be serious. Closed up gun shops are great, too. Good luck. A note: I long ago stopped helping dealers price their odd stuff. I got run off at a table once and was called a "F###" another time. So if you see something real for dirt buy it!