Bindi is usually worn by Women. It is a round fabric that sticks on the forehead.

Tilak is powder/paste of different types.

You can find it on Amazon.

Here is a sandalwood tika which is not red.

https://www.amazon.com/PURE-SANDALWOOD-CHANDAN-TIKKA-PASTE-40/dp/B00AZL8VWI

Here is the red powder people use.

https://www.amazon.com/Kumkum-Powder-Pooja-Other-Rituals/dp/B00PDKADVS