If you are in need of a replacement lead leg for your Venture vmc900r you'd want the part # LG-177202 or for a follow leg part # LG-177201. The lead leg is the one you'd attach the crank handle to and the follow leg is the leg that is opposite of that one. view full answer...
To find the correct replacement seal you'll need to know the profile (shape), dimensions, and how your current seal attaches. You'll also want to see if the bulb seal (round part that compresses when the trailer is closed) is separate from the wiper seal. The # SR38FR you referenced would pushes onto a track and grips it with the little "teeth" I have pictured below.
You can start pulling it up a bit to determine exactly what you have and take some pictures and send them in and I can... view full answer...