You would think that Pella and Andersen would be trying to tap this market. I'm in the market for a new slider and if either of them had this option they would earn my business even if it was $1000 more than the others. Aftermarket sales would be huge also. At this point I think I'm resigning myself to something like this: https://www.amazon.com/gp/product/B00CXTPME0/ref=ox_sc_act_title_1?smid=A21C4U5X700J66&psc=1
And yes, I'll be sinking some long, long screws into framing to make it more secure.
The problem is that lock will not work with a Pella slider...Pella slider uses a different latch system.