Except go to 63/37 instead of 60/40. 60/40 is a hair cheaper but 63/37 (also known as "Eutectic" composition) provides a much lower chance of getting bad solder joints due to it having an instant fluid to solid state change.

Best place to get an American brand (Kester) is through Kimco at www.gokimco.com
https://gokimco.com/44-rosin-core-solder-wire-sn63-pb37-031-66.html

This is a good Kester #44 rosin with 63/37 tin lead composition.
It costs about 2x that of the Chinese stuff in link above but is for a full, 1lb roll instead of the less than 1/4 lb roll.
You can also find the Kester #44, 63/37 solder in 3/4 ounce tubes on Amazon.