Nostalrius Begins - Quality wow vanilla realm (1.12)

Literally every google search turns up with heirlooms.

What gear would an ideal lvl 19 warrior twink have?

You should ask Solmar, i am sure he will help
He is alliance

You can check here for gear, and here for weapons. It shouldn't be too difficult to figure out what's BiS for a 19 twink warrior.

I have written some gear suggestions for level 19 twinks that I have found on http://classicguides.app. Here you have guides for rogues https://classicguides.app/bis-twink-items-for-a-level-19-rogue/, hunters: https://classicguides.app/bis-twink-items-for-a-level-19-hunter/ and warriors: https://classicguides.app/bis-twink-items-for-a-level-19-warrior/