Disclaimer: this is a first world problem. Please read on with this understanding.
I am in the process of converting an old barn into a garage. It has 2 levels. The lower level has a double swing out door that we have added an electric opener to which comes with a pair of nice 4 button remotes like the one on the left. As far as I can tell from Google it is a 433.92MHz rolling code device.


The upstairs level has sliding doors with a completely different opener (I have 4 of those remotes) also with 4 buttons and as far as I can tell operates on 922MHz rolling code. Now, I have 9 (soon to be 10) cars that I intend to park in this barn and I'd like every car to be able to open either door so I'd love to find a single aftermarket 2 button unit that can work both devices (and therefore on dual frequency bands). The alternative is purchasing 8 more clones of the lower level remote and 6 more of the upper remote and carrying two remotes in each car, each with 4 buttons, 75% of which do nothing and that bothers my OCD.
Appreciate any suggestions (even if those suggestions are to take a xanax and deal with a extravagance of extra fobs and buttons to open 2 simple doors. And no, I am not comfortable with assigning each car a particular spot or level - I'm all about flexibility and snap decisions....
For visual reference - lower level (ignore my 4 year old rolling around on the ground):

And upper level - both still under construction:

I am in the process of converting an old barn into a garage. It has 2 levels. The lower level has a double swing out door that we have added an electric opener to which comes with a pair of nice 4 button remotes like the one on the left. As far as I can tell from Google it is a 433.92MHz rolling code device.


The upstairs level has sliding doors with a completely different opener (I have 4 of those remotes) also with 4 buttons and as far as I can tell operates on 922MHz rolling code. Now, I have 9 (soon to be 10) cars that I intend to park in this barn and I'd like every car to be able to open either door so I'd love to find a single aftermarket 2 button unit that can work both devices (and therefore on dual frequency bands). The alternative is purchasing 8 more clones of the lower level remote and 6 more of the upper remote and carrying two remotes in each car, each with 4 buttons, 75% of which do nothing and that bothers my OCD.
Appreciate any suggestions (even if those suggestions are to take a xanax and deal with a extravagance of extra fobs and buttons to open 2 simple doors. And no, I am not comfortable with assigning each car a particular spot or level - I'm all about flexibility and snap decisions....
For visual reference - lower level (ignore my 4 year old rolling around on the ground):

And upper level - both still under construction:





