Where do I get jackstands with a flat base?

[Maengelito]

its not like no one will let you borrow their jack/jackstands in the paddock. it takes up a lot of room in a trunk and i dont have much to spare, so its not a priority for me seeing as how borrowing them is a viable option. thats how i bled my brakes at VIR this past weekend. btw, thanks b00bies for letting me borrow your jack whether you knew it or not

You used my jack. You can jack me off next time.

again?