Where would be everyone's recommendation be for acquiring a rear fender?
Will they potentially be available at SSITS?
What about installation; is it something that has to be dealer installed?
First question... What is the reason for a fender? Most of them out there are good for looks, but won't keep the 'rooster tail' down. Most of them don't come down far enough --- front --- to keep the back of the Slingshot clean or back to keep the water from the rooster tail down. I do have one that does both but they have not been made for 4 or 5 years. If your just going for looks lots of options out there. You may not be able to buy and get it installed at SSITS but you will be able to see lots of different ones.
The front side has a rubber piece that closes up the front.
They have some major problems with the design ... They were great for 10,000 miles and than fell apart....go ahead and ask me how I know with having one since Aug 2015 and have 102,000 miles on the Slingshot with these fenders...