Well, that was rude. I only have one free lineart uploaded and it's in the Free-To-Use folder where you should check. Or there's a search gallery option at the top of the page.
I found it to be rude for three reason; One, they are using a demanding tone. They could have said, 'Do you have any free lineart and if where would I find it?' It's a polite way to ask where they just asked 'Where's the lineart' Two, it's easily found in my gallery. It's like asking someone if they have commissions and they respond that the info can be found in their journal then turning around and asking for a link. It's not that hard to search for a few seconds. Or to use the search bar and type in 'lineart' Three, it sounds to me like they expect everyone to have free lineart for their enjoyment. Where as that would be great, some of us don't do that or can't provide our survives for free, even if it's just a lineart.