Build it yourself. Even if you want a matching upper and lower its still a better, easier deal to do it yourself. You can customize all the parts and install everything yourself easily.
For example, I bought a Noveske stripped lower, Noveske complete upper, Daniel Defense rail, Spikes LPK, Geissele trigger, Magpul furniture and just assembled everything myself with basic tools. Now its a unique Noveske rifle with top end parts.