Would like to change out my ambi safety selector on a LE6920 with a regular one that is milspec-looking with a thin nub.
I found a DPMS one from brownells, but is this selector good quality?  

http://www.brownells.com/rifle-parts/safety-parts/safeties/safety-selector-prod17540.aspx

BCM has one but I don't want to use a 3-position 3-burst / full-auto capable safety on semi-auto rifle.
Colt sells one but it has a fat nub.

Any suggestion on which reputable manufacturer for me to go for?
I would have preferred Colt or BCM but I don't think they made one which looks 100% of that DPMS semi-auto safety selector on the link above.

That one looks fine. It's standard.

Using the BCM one won't give you full auto or burst. The third position would just function as an additional "safe" position. Many more parts required to actually make it select fire.

So installing this BCM 3-position, the semi-auto will still function.
This part is drop-in and no modifications needed?

http://m.ebay.ca/itm?itemId=321402257904