Are you referring to the height adjusters?

The part that holds the pinion gear parts and the wheel is called the Pivot Arm Assembly and the lever/handle that you adjust the height with is called the Knob Arm.

Actually, these are just plates that you bolt on next to the height grooves that are built in to the deck. Just spoke with Toro who tells me I am looking for part #43-5050 in a quantity of 2. ( The purpose is to repair the filed down height adjuster grooves in the deck ).

After market repair add on.. I got you now.

ebay and such places have them for around $22.00 a set or $11.00 each. Be hard to find them used due to them being used to repair a deck. Then the deck would have to trashed before someone would remove them.

Thanks for the tip - will check ebay.