Dynamic carousel on individual posts

Question

I'm using Wordpress as a CMS for a small business website (not my first choice.) Each product page needs to have a small carousel of images that contains images relevant to the product.

I've set up a custom Post Type for the products and am currently using custom fields to display some information specific to each product. I can't just cut and paste the code for each individual carousel into a custom fields; since, to get the images properly, I need PHP in the code for the carousel.

I also can't use individual custom fields for each image since the number of images in the carousel could be unpredictable.

Is there a good way to do this? Suggestions are appreciated!