> However, we all know that quarks and more exist, so you don't think it's possible that an advanced race could make a material that skips that atom part?

Quarks combine via the strong force into baryons, the most common of which are particles that form the nucleus of atoms and anti-atoms, and mesons, which are unstable and immediately decay into electrons, photons, neutrinos, etc.

Of the baryons, protons are stable, neutrons less-so, and the rest decay immediately. Perhaps there is a configuration of non-nucleon quarks that bond together into a kind of stable matter that we have yet to discover, but it seems more likely to me that if (and that's a big "if") there were exotic matter in a warehouse in Las Vegas, it would consist of novel alloys or other such materials.

Disclaimer: I'm not a nuclear physicist.