Still,
I'll try to get a pic up this weekend. In the mean time, I'll try to describe it better. I bought the foam weatherstripping at Home Depot (but I can't find it on their website of course), it is weatherstripping that is intended for windows - I believe specifically for window AC units. It is about 1/2" thick by 1 1/2" wide, and comes in a
package of about 3' or 4' I think. It is white in color and very soft - closed cell foam (very comfortable).
I cut a piece that just wraps around my penis (about 6" long), tapering the ends 45 degrees so they overlap. I cut it with a serrated kitchen knife. In use, I place it on the area just below the head and then put the clamp on around it.
After several months, I have not had to cut a new length of foam. It is dented where the clamp has exerted pressure on it, but still retains plenty of softness. Pretty resilient and durable stuff. I believe any firm closed cell foam of similar dimensions would work. This stuff is, however, quite comfortable.
I will be going to Home Depot tomorrow or Sunday (with any luck) to get some needed junk, and will find the brand name of the weatherstrip and price to post here.