I called them up and was told delivery would be January 6th.
That is 42 days for an "in stock" item. I could see another additional delay on the horizon. So yea I tried to work with them. But I wont be screwed and I canceled that order.
So after some googling I bought Genuine GM Cover 19133288 with gasket and bolts. It has no dang fill bolt so I am filling with the vent tube. But it will replace the rusted cover I have now.
Amazon has this kit for under $50 and it can be to your door within 4 days not 42.
https://www.amazon.com/GM-Genuine-19.../dp/B08WHJRG7X
As far as cheap covers with a fill bolt for the 9.5" your looking at spending $150+, making one yourself from a factory cover, or just filling through the vent tube.
There is a 9.5" cover in the 2000ish SF 14 bolt. But it only showed it only worked with those years on multiple sites and at this point I did not want to chance buying one that would not fit.
But those covers(without the bolt) were going for like $70ish. Maybe with a bit of massaging you could get one to work on a square body 9.5". Or it could be horribly off and not work at all.