Your best bet is to do a search at a couple of places that sell aftermarket sets. I always use these two:
www.squadron.com
www.meteorprod.com
Squadron carries all makes of resin and photoetch, and Meteor carries others, as well as has their own line called Cutting Edge, which is some of the best resin accessories out there.
Just type F-15 into their search boxes and see whatcha get :).