I got them through redlinetuning.com. I think you can also buy through amazon now.
https://www.redlinetuning.com/2021-Ford-Bronco-Hood-QuickLIFT-PLUS-p/21-11039-02.htm
There is a good thread i saw on the MRT ones. https://www.bronco6g.com/forum/threads/install-mrt-hood-strut.30357/
I did the same thing. The fenders come off fairly easily. I used a door panel removal tool to get the fender cover off and an extending magnet rod to fish for the stupid thing. LOL.
Not at all. No drilling. Unbolt the bolts they tell you to use, put brackets on, re-bolt, and pop struts on. Done and done.
I did drop a nut down the fender well but you can attribute that to me being a dumbass with fat fingers. Wasn't too bad getting it out. LOL