looks like the Area 74 one is a like different from the token solution style ones. Won’t matter to you but if that thing is $120 then I wouldn’t pay for than $60 for a token solution one.
Though it would take ~$2 and 5 minutes to make one to give you an idea of the complexity involved. The Area 74 is probably a little bit more robust for newer vehicles or vehicles that performs emissions equipment check like if you car had a smog pump for example. These cars are very simple in that regard and a 555 timer based one will work. It doesn’t look like anyone is making the 555 timer ones readily (especially since they are garbage for newer vehicles).
If these Area ones are what’s readily available, then I’m pretty sure they’ll work fine. If you buy an electronics kit and learn soldering, then you can create 555 timers for a few $ every time the simulator breaks. 🤷