How to replace entire bags?

[Silenttakedown]

So I'm trying to build my energy sword, and not even on the second page, I was missing 2 parts, I ordered them and about a week or two later I received them. About a page or two later, another part was missing, but I luckily had no issue as I could find it. I had no issues up until I needed bag 7, which is also when I realized Bags 7 and 8 are completely missing. I looked around and the box has nothing in it, and I couldn't replace it, as where I bought it from has no more in stock, so I could use a tip on how to replace bags.