I need to replace a cover that looks like this...

http://www.yumabassman.com/encoderco...er%20Cover.jpg

.... with a cover more like this ...

http://www.yumabassman.com/encodercover/New%20Cover.jpg

, because the new encoder takes up more room.

I could make it out of fiberglass (messy), cut it out of a solid block of
acetal or aluminum (expensive), or fold a hack job out of sheet (sharp edges
and not pretty), but I am hoping somebody will suggest a simpler more
elegant solution.

Here is the application:

http://www.yumabassman.com/encoderco...-47-39_861.jpg

I would like to funnel any coolant away from it, and protect it from being
bumped into there on the front of the machine.