@
Fmtrx your headset and bottom bracket spindle parts look fine and there is no need to replace them. Please post a picture of your bearings after cleaning. There's a good chance they are fine as well. If they are shinny and show no corrosion or discoloration you can continue to use them.
The damaged plastic piece is a bit of a mystery to me. Where is it installed and what does it do? Possibly @
cudak888 can identify it and provide some insight as to its purpose.
That is great news on the LBS mechanic being able to remove the stem.
