Yes, that would be my next step if no gaskets are found.
I also wanted to note others with like lights...
The hard Rubber sockets on these lights push UP from the bottom up and then are twisted CW about an eighth of an inch to lock in the socket.....
IF you push down too hard on the 168 bulb you can accidently push the socket down and out of the light fixture possibly dropping down inside the front or rear cap!
It happened to me but got lucky...it was a rear clearance light near the backup camera so I pulled the camera bracket and was able to reach up and reconnect socket to housing!
Robert McHenry
Currently, Henniker NH
07 Fleetwood Discovery 39V
1K Solar dieselrvowners.com
2005 Jeep Grand Cherokee
Prior:1993 Pace Arrow 37' Diesel