This video shows how he removed the pins without breaking them. Whether they can be re-used, or this even works, is something you'll have to find out for yourself. I couldn't find a source for just the pins with a quick Google, but someone may make them..
Link to video: Caravan window regulator R&R
Thanks for the link! In the video he showed how to remove them without breaking them but when he installed them he used bolts. He said he wouldn't wish it on anyone.
I'll admit, I didn't watch to the end, and oddly enough I've never had to do a regulator on that generation Caravan, but if he used bolts I would just follow that advice. I've used 1AAuto videos plenty of times in my line of work, they aren't always perfect but they really do seem to lay it out in layman's terms to help you get the job done.
I re-watched the video, and he didn't seem to specify what type of bolts he used, but since he said he used a screwdriver I would assume he used machine screws and nuts to secure the motor. That's as good an option as any, although I would have just used nuts, bolts, and washers.
Good luck on the project!