If you want the shaper/router version that mounts to the quill with the mustache it is here:
http://www.shopsmith.com/ownersite/catalog/ms_shaperroutershield.htm
$22.27
it has some attempt at dust containment..... and slides up for access.
The flip guard is priced at $29.99 and of course it "flips-up" no attempt at dust containment.
There might be another option if and when you ever get a powerpro and the dual tilt (under table shaping), the router table shopsmith sells has another guard/dust collection system. I don't see the piece listed but a call can most likely get you that information. This is the system:
http://www.shopsmith.com/ownersite/catalog/rm_routertable.htm
This has a port to hook up a dust hose at the top and it does work, again better then the others but not perfect. You would have to deal with finding a way to mount it but there are ways.
I have the two older versions and they work best at keeping you away from the spinning cutters and they do provide dust containment.
Of course on the over the top operations the dust collection is from below, this is taken care of with this:
http://www.shopsmith.com/ownersite/itemfind.htm?item=555168
I don't have the flip up version, yet anyway.
Ed