Two piece 87 vent window help

[Sodell]

I am rebuilding my vent windows on my 87. I purchased some vent seals a few months ago along with the rest of my seals. I got the one piece seal, but I have the two piece seals. I am wondering where I can get the two piece seals? I found some that have four rivets for the straight piece, and the newer ones have these tabs..I hope some one with experience with these vent windows can help me out, I know there was a difference from 73-80, and 81-90, but I thought the 80 and up were all one piece.
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