how to replace a fan on a longer lk4 pro

hello my stock fan died on my 1st printer and im going to be repairing it on xmas

i see two options for what i can do but i have no idea how to do it properly since theres not video to do it on a longer lk4 pro specifically

1: get a duel blower for xmas (i dont know if the tutorial to do it on the lk5 pro is the same since its a bigger printer)

or 2: get the fan off the website witch needs to be soldered on (i dont have a iron) and risk wasting time and money on something that in the end isnt even going to function and mess it up like i did last time

i need advice for people who have used this printer and know more about it i got no help on the offical subreddit for that specific brand