[Animats]

Romanian giant tomato. Buy seeds for US$3.99.[1]

This would be a good project for the Open Source Farming Robot. Assuming you actually want a kilogram sized tomato.

[1] https://www.davesseed.com/product/romanian-giant-tomato/

[schoen]

Looks like that particular supplier is in Tasmania and only ships to Australia!

[Animats]

It's a variety of beefsteak tomato, and those are widely available. At WalMart, even.[1] They're unusual, but not rare.

[1] https://www.walmart.com/ip/Beefsteak-Tomato-Plants-Two-Live-...