Wild west custom guns makes synthetic stocks you can either get it fitted by them to the tune of 500+ dollars or you can get it unfinished for 250. You can also get the oversized lever loop, the one piece ejector, aluminum magazine follower, lots of little goodies.
I went with XS systems scout mount and ghost ring sights. Brownells carries a lot of cool guide gun excessories. This is mine with leupold 2.5x IER scout scope and xs systems sights and mount.
Brockmans is another one that makes some cool lever stuff.