I just started WB this summer and in my naivete I thought 2 spare mags was enough. After my second stage with 8 mag swaps I learned the error of my assumption. I just found and ordered a bunch of 7 round Wilson Combat magazines at a great price. They have them listed for < $20 but there's a banner to "Chat" with a rep. I ended up getting a half dozen for < $16 ea in BLK and another half dozen for like $18 in Stainless.
https://www.opticsplanet.com/wilson-combat-920-series-full-size-1911-magazine.html?_iv_code=C0-PMG-920FSM-920-45FS7B-7RD
