Oh, the closures for the Power, water and sewer openings. I couldn't begin to understand what you were asking about.
Now I know as I have those too. I've never lost one.
I did a search and found it in the Parts Catalog
142226-02-700 Locking Tab, Turn Lever, Red
Sometimes called Turn Buttons and they are available generically, but if you want the real thing call Lichtsinn RV 641-585-3213.
Here's what Lichtsinn calls them - $.80 each:
Part Number: 14222602700
Part Description: EATAB/LOCKING - ESCAPE (RED)
Retail Price: $0.80
Here's a generic listing from Lowes:
https://www.lowes.com/pd/Saint-Gobai...e-Clip/3094755
Here's a link to the Parts Catalog on line. Be aware there are two versions based on when your Tour was built. But I'm sure this part is the same on both versions. The link below is for 2017 Tours with a Serial Number beginning with 10R96W1:
https://catalog3d.winnebagoind.com/2016/16wkr42qd.htm
Here's the link for the other version with Serial Number beginning with 10R96W2
https://catalog3d.winnebagoind.com/2017/17wkr42qd.htm