As a general note, if the device pairs there is some chance for eventual support. To help Securifi with a "new" device I would recommend:
1) Attempting to pair the device (which you did).
2) If it does pair but has no (or partial) features do what you can to activate whatever it does have. This will not make it better then, but the Almond might capture the data anyways (and just not know what to do with it yet)
3) Upon the device not having expected features (or none) send a log push to the device with the model of the device and a quick statement.
4) Post in the forum your experience with as much info and device information as you can (which you did) and mention when you pushed the log and what you called it.
Hopefully Securifi will notice it and be able to do something about it in a future release. Or sometimes there have been things people could recommend that help (like resetting the device then adding again). Or others also post and get it more traction.
Sorry this does not answer your question though... I have no recommendations on a keyfob except the Securifi one, or the Securifi Click buttons... I do not have any others (although sometimes I use Amazon Dash buttons for similar purposes also).