You can get a Silver Alien Spin Token from the Alien Calendar 2021 and in the Alien Statue Event 2021.

Here is a list of prizes that you can get:

UP TO $500 MILLION CHIPS!
Alien Entry Key
Piggy Token
XP Token
Tickets
Gold

You can find the odds of the Silver Alien Spin Token below:

You can get a Golden Alien Spin Token in the Alien Balloon Event 2021.

Here is a list of prizes that you can get:

UP TO $5 BILLION Chips!
Alien Entry Key
60 Min. XP Doubler
Piggy Token
Ultra Spin
Tickets
Gold

You can find the odds of the Golden Alien Spin Token below: