Looking for a front hatch - closing fastner - S2 8,0

[overholtzer]

I have a S2 8.0. The opener on the front hatch is missing the knob closer that allowed the hatch to stay propped up. I've seen them on other boats and it is a squat cylindrical knurled piece of stainless steel that fits over the threaded female rod part of the lever arm.

Short of replacing the entire lever arm, does anybody know where I can get a replacement closing device?

There is a photo of the lever arm at: http://www.flickr.com/photos/13638962@N03/1392120093/