Hobbywing, Castle, and Tekin just to name a few, all have good motors.
You need to know what size your motor is, and what the kv or turns are for your current motor. Make sure it has the same shaft diameter as well.
Most reputable motor manufacturers will list what the motor's intended use might be, whether for buggies, truggies, monster trucks, etc, as well as its intended drivetrain, like whether it's best for 2wd or 4wd vehicles, as it does make a difference, which is typically based off the kv and power range the motor can handle, amoung other things. But generally, the manufacturers have enough info to help you choose.
Note: whenever you change a motor, always check the temp of the motor while doing your first run. A cheap infrared temp gun from Amazon is a fairly necessary tool in this hobby.
Bit if you want more help here, you need to tell us what car or truck you have, and any info from the motor you can give us.
Welcome to RCT Curt!