Ever since our usual photo site stopped allowing items to be linked to other sites, such as here, I've not been able to find a site which allows it.
So, you need to upload it to a site that allows linking to other sites.
The other possibility is to send the scans directly to peoples' emails. I usually reduce their size first, or else scan them on a low resolution to begin with.
I hope that helps...
Love All Life; Thank You For Posting! :)