Need help with top side window rubber single wall or double wall?

[kna4977]

I'm getting very close to replacing all the glass in my Blazer. I went to a glass place today, and they are going to do it. I do however need to find a source for the weatherstrip just in case they ruin one or more. I've looked in the LMC catalog, a local parts place and at brothers trucks, and they all say it's for the double wall top. I thought the double wall top was on the base models, and did not contain the dome lights, but when I look at the Brother's website, they say the double wall top was the one on the more deluxe model with the dome light. Which is it? I need to be sure before I do this.