socialKit author disappeared from last 4 years, Can we upload again?

SocialKit author disappeared from last 4 years, As we can see customers are asking for support but author is not replying.
We modified this script and added lots of new features. Can we publish this script with another name or similar name?

It cannot be sold at another user/account. I can offer paid support if you’re interested in

We also needs to provide paid support for this script, Thats why asked.

No it can’t be resubmitted by someone else regardless of new features etc

Now author removed his item.
its not available on portal.

No, it’s 100% not eligible. It will be copyright issue and by doing this your account can be suspended.
You should submit only your own item regarding your own copyright.