The parts sticking up are the delivery valves. They are a 32 spline fitting and they screw into the injection pump body. Below these are the elements.

I wouldn't think a local machinest could ever make pump elements. They are extremely EXTREMELY precise pieces of work. They control the fueling behavior of the pump.

If you want to upgrade the pump:
Remove it from the engine
Send it to Goran at Dieselmeken
He'll install bigger elements and recalibrate the settings
Reinstall the pump
Add more air with a bigger turbo to burn the extra fuel.

Done, after a few thousand dollars.

__________________
'84 190D 2.2 5MT (Red/Palomino) Current car. Love it!
'85 190D 2.2 Auto *Cali* (Blue/Blue) *sold*
http://badges.fuelly.com/images/sig-us/302601.png
http://i959.photobucket.com/albums/a...0/sideview.png