Since I haven't been able to do lateral work for about a year now I was struggling to find something that stimulates the side delt, or at least gave me a similar feeling. I started doing a one arm smith press while sitting side-saddle. I've described it here before but when I'm done regular smith presses I move to this movement. You hold the bar like a spear or javelin with the elbow canted slightly forward. It gives me a killer feel in the side delt. Absolutely love this movement anymore. I bet you will too.
Keep the reps moderate as it's not about weight. I do 3 sets of 10-12 reps. If you try it post up how it goes please.