There are any number of them, I suspect they're all about the same as far as performance is concerned. There are some that just control central locking, plus there are some that include remote starting, and some that include an alarm system, so you have to pick which type you want. If it's for your Tempest you'll need to get a kit that includes actuators. I see on Amazon you can get a kit for under $30 so it will be a cheap experiment.
https://www.amazon.com/s?k=central+locking+system+kit