I am looking for the top half with the round air inlet instead of the oval as on the 105's Part # top half 101.21.08.210.00
And if you happen to have a bottom half as well than the part # is 101.21.08.011.00
Here it is. Bought if from an old guy cleaning stuff out of his airplane hanger last year, and he thought it was repro.
I don't know how exactly to tell a repro from original one of these. The vent tube inside the box extends higher than the one on my 101 Spider, if that's a help.