convert infrared remote control to radio

Hello
has one of its infrared remote control already converted to radio, although the original audio alarm system was built with indoor surveillance ?
I can keep the originals and only connect the receiver by bypass or the old one must be killed.
I'm really pissed off by this infrared shit.
wanted to get me a flipkey and reprogram the transponder for the ignition lock.
there are hand transmitters that fit with light modifications in the key.
the problem is just the existing original alarm system.
I didn't really want to install a whole new one.
I'm grateful for every tip.

MfG Bud