For a great quality Garmin 2 bolt style stem mount, I would buy from Niu Ju.
https://shop100416241.taobao.com/?spm=pc_detail.27183998.202202.1.602e7dd6DVlvtKYou can buy direct, but I think paying a very small amount and using a proxy service like superbuy (
https://www.superbuy.com/) is worth it if you dont want to deal with the Taobao app being in Chinese. Should work out to $36ish USD (shipped).
I have one of these and the quality and design work is fantastic. As good as anything out there at any price. Because they are stem specific, they are also safer to use and look cleaner. Some people say these are relabeled by Frames and Gear and CCache. I don't know if that's true, but these are good enough that I wouldn't blink twice if someone tried to sell one to me for $70-$80.
If you can tell me what stem you want to fit this to, or the bolt spacing I can try and find you the right one.
