Here is what I used on my 2015 30DS
They have to be manipulated a bit to get them to snap on. Don't be afraid to bend them they won't break. I ran a small screw through each upper corner tab into the gutter to make sure they wouldn't blow off. They work fine as long as the wind isn't blowing the run off back on to your coach. Walmart in some stores or online.
Thanks for the reply and the detailed pixs. I have ordered them and now I have to ask my neighbor to lend me his ladder. Or maybe I'll lay on the roof and try not to drop my screwdriver. Thanks again, DS