The seat should be an easy one. That should be the standard, 2-bolts on the rockshaft housing, that most older MF's used. Tisco makes a nice seat, 1050ATSP is the number maybe? Black, suspension seat with little side supports. I've replaced a few of my older ones with this. Pretty happy. Not very expensive, $100 if I remember right. Can probably get the same thing from Sparex, Temco any of the aftermarkets.
Might be a good place to look for a hood too.