Merc Outboards Where Can I Find Parts For A Merc Ke7 Outboard Built In 1947?

Where can I find parts for a Merc Ke7 outboard built in 1947? - merc outboards

I have an old Mercedes and pieces must it.Years found locally in Maryland, the parts had not been used, but I forgot name.This engine was purchased new in Minnesota for my stepfather, and 'was used twice to save them, until I found that the cleaning shape.Can on top of shed.I someone wants to help?