Try Intermountain Air
Address: 301 2370 W, Salt Lake City, UT 84116
Phone: (801) 322-1645
Don't know about their hardware supply. Have only bought primer and intake gaskets from them.
Metal Supermarket has a remnant section that might have something you can use. They have 2024 sheet, but I don't often see it in the remnant section.
537 Pickett Cir #800, Salt Lake City, UT 84115
Phone: (801) 972-5911
Marshalls Industrial Hardware
Warehouse style hardware store - great selection, but don't expect to find AN fasteners here.
Address: 2210 W California Ave, Salt Lake City, UT 84104
Phone: (801) 978-0555
Find time to say hello while you're here. I'm hangared at KBTF and live near downtown SLC. You can email me through this site or call or text (no voicemail). Use the area code above then 502 sixty-nine twelve.