I'm in agreement with Hasbeen. I don't understand why the contact wire wasn't pulled thru the jam during install but since it wasn't you should be able to fish that over to the proper location for a magnetic contact. A metal punch, low speed metal drill bit with some oil, 3/8" wood bit, magnet/chain and some patience should get the job done. We've retro'd contact wires into jams of metal/glass ornatmental doors, steel panic room doors and art gallery bank vault type doors costing far more than what you're working with there. I think surface mount and/or wireless would be a disservice personally due to the look, battery failure, and risk of the contact falling off or being tempered with. Just my opinion but you're within inches of having it done right so unless I'm missing something in that pic it should be doable.

I did have similar installation few years back, with quad sliding 'pocket doors'.
We ended up removing the door, drilling at an angle from the inside edge of the 'frame' towards the wall (from inside to outside).

I didn't care where I came out on the wall side as drywall stucco would cover it. Once the magnet was in, door was reinstalled, locked and place for magnet was determined. Removed the door once again, drilled 1/4" hole an installed the magnet.

When done you couldn't see the sensor or the magnet unless you removed the doors.

I would paint a 5811 brown, put it on the back edge of the sliding door, use a flat magnet on the non movable part of the door and call it a day. Our little secret, prep surface with surgical grade alchohol and do not use screws.

Surface mount? Looks like crap. This looks like a single slider so all you have to do is move your wire and install the contact in the door jam; then drill out the magnet on the slider side. It's done all of the time without issue.

I understand your concern about an expensive anodized aluminum door but would you be asking the same question if this was a custom designed inported wood front door? Probably not, you would just do it and be done. Do it right, get the wire into the jam and either use a plunger contact or magnets and be done with it.

Just be aware that MANY door/window manufacturers clearly state if you drill into an jamb it voids warranty.

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