None of these is specifically what you asked for but...
<kuid:156765:100103> Cast Iron Crossbuck by simulatortrain
<kuid:404894:100292> MTR Oval Xing Sign by dericm
<kuid:404894:100866> MTR Crossbuck 1 by dericm (mounted on rail)
Davesnow has 30 or so "Old Crossbuck"s
by gfisher
<kuid:106916:10217> PRR Road Crossing Sign 1t
<kuid:106916:10218> PRR Road Crossing Sign 2t
<kuid:106916:10222> PRR Road Crossing Sign NJ
<kuid:106916:10223> PRR Road Crossing Sign PA
by pencil42
<kuid2:124060:37017:1> Old East Railroad Crossing sign
<kuid:124060:37040> V&T RR Crossing Sign, old
<kuid2:124060:37016:1> Old West Railroad Crossing sign
Not what you asked about but I just found this and had to share

<kuid2:61556:100029:1> 1912-1913 crossing target or tilting target signal by seniorchief