I’m looking for software to run my own parking company. I want to park only my own domains And have google parking links appear in them. Domainzaar used to have this but they don’t exist any longer.
Domainzaar is an old days thing, when anyone was allowed to run ads on a parking domain. This is over quite a long time ago.
Parking companies (Bodis, Parkingcrew, Sedo, Smartname, Skenzo) are approved by Google and use Google parking feed. There are additional minor feeds like Yahoo, Zeroclick, etc but these are mostly utilized for Google banned or low quality domains. The thing is that only a minor revenue share goes to the parking company (cc. 20%). The big part is taken by Google itself.
Let's assume that you are such a big player that Google will approve you (highly unlikely). I am not sure if it is even possible to get approved these days, independently how big you are. Still, you are surely smaller than the parking companies listed above. It has a consequence that you will get a worse contract from Google than they do. So even if you keep 100% from your own, private parking company, this 100% will be less than 80% from a parking company. Not mentioned the cost running this private parking company, since you have to deal with all aspect on your own (https, speed, bot blocking, frequent design change, etc)
So the short answer is that it is not possible.