Not at my parts-book but if memory serves...it's a common Airpath. Aircraft Spruce sells 'em.
'53 B-model N146YS SN:25713
50th Anniversary of Flight Model. Winner-Best Original 170B, 100th Anniversary of Flight Convention. An originality nut (mostly) for the right reasons.
Yes, that picture is 118F. It was taken the day after its last flight around April 22, 2003. Almost exactly two years ago. I bought it in September 2003 with mud still on it. Currently it is ready to take to the airport and reassemble. All I need to do is to figure how to get it off the second floor of my shop.