welcome, and I love your name!
I work in pastel as well. I believe to do a good print, you will need a super-high quality photograph of the work to start. some may be able to do this on their own, I know I would not. getting it professionallly done would insure you a better outcome. I couldn't begin to afford such a camera, much less the other equipment, plus, the experience. I would look for someone who knows how to do artwork, not just photos of the kiddo's.
and just cuz you didn't fix doesn't mean that work is fragile as butterfly wings. I've had paintings (plein air) literally blow across the prairie, one I didn't care too much for and left in the back of my van for months (setting groceries, bags, etc. on top of it), and both still were fine and sold later! so give pastels a little credit, eh?
if the work is small, a scan would be great. otherwise you have to overlap the scan and stitch it together in a program.
getting prints done is an art in itself. wuold love to see what you're printing!!