Most parts are available for the MF-35, especially if equipped with the Perkins diesel or the Continental gasoline engine, but do not expect the parts availability from either MF or, especially, aftermarket sources that your are used to for N series Fords. Most parts will be more expensive than similar parts for your 8N due to much lower manufacturing volumes.
There simply were far fewer M-35s made than N series Fords.
The 35 power steering system can be expensive to repair.
Optional Multi-Power systems are often non functional and are expensive to repair.