You can get custom blinds at HD, too. You just have to ask the people at the counter/desks in the window covering section. Not sure if this would be the cheapest option, though.
We also got a bid from Budget Blinds. They don’t have the aluminum blinds, but have plastic/vinyl white blinds with wider slats. For 7 windows and one sliding glass door, it came to about $1,200.
Good luck on the fireplace screen replacement. We had the same issue some years back (in our rental), and finally gave up trying to find one. Would love to know if anyone has a good local source for these.