Ok, so now it's at $38 dollars, without the programming connector, power supply stuff, and fuse. (I figure you only program once, and will use a PC power supply)
https://www.mouser.com/ProjectManage...sID=5e17007e20
And I used network resistors where I could to keep the parts count under control (which means those would need to be replaced with standard to use with the existing board layout, or a new layout made)
Before I order the parts, I would REALLY appreciate it if anyone would check it over and make sure there are no errors.
https://www.mouser.com/ProjectManage...sID=5e17007e20