They make a lot of them. It's pretty much just valve stem caps with a wireless sensor in them that send their info to the receiver which plugs into your cigarette lighter. They do sell higher end ones that use internal sensors similar to OEM units. I've seen them with both dash mounted displays or cigarette lighter type. If you search Google for "aftermarket TPMS" you will find a lot.
Here is one of the valve stem cap ones:
https://www.amazon.com/gp/aw/d/B01LA...d_i=2201765011
Here is an internal tpms one:
https://www.amazon.com/gp/aw/d/B01K6KEQ8U?psc=1