Picked up a nice 1873 Winchester missing the rear barrel sight. Before I go on eBay or GB has anyone got one they’d part with? Rifle was made in 1887 so kind of early/mid-production. Standard rear sight with side serrations and small adjustment plate & screw would be the most correct I guess. Also would like an elevator without thumb tab that has slanted steps. %80 or better please with no pitting or issues. Will pay with US Postal MO. Would greatly appreciate a few close up pics.  Thanks