Hi Niveditha,
There isn't a way to share with individuals. You can only share with teams, but you know that. So the only options are:
- Create a special project/team with just these people then share it there.
- Send them the source code of your custom html page, with the quick instructions of how to add it for themselves.
Probably the second is the easiest considering it's not too many users you'd like to share with.
I think it may not be a bad idea for you to post an enhancement request to allow sharing pages with individuals, not only with teams.
I hope this helps.
Sagi