Replacement Keeper for Arcadia 700 series

My apartment has the old 700 series sliding glass doors by Arcadia leading out onto the balcony. Some dingbat prior tenant broke the handle on the one, removed it on the other, as well as the keeper. The levers I can find. The keeper, however, is another story. I've attached their sketch of the correct part from Arcadia's website, and yes that is in fact a bolt in the middle of the thing. It's hideous, and I can't find one. This one looks like it might serve the purpose. Has it been tried so I can at least not reinvent the wheel? What's the minimum distance apart the screws can be on this?

Therein lies the problem - the keeper is entirely missing, there are just holes in the metal frame where it used to be. I'm in an 8th floor condo, so I'm not exactly worried about intruders. But the exterior wall is all Arcadia windows with two sliding glass doors, one onto each balcony, and two sliding screen doors. Some halfwit did away with one of the keepers, broke one latch lever and removed the other, and the screen doors are pretty mangled, possibly beyond my ability to repair. Wish me luck!