Instead of e-mailing a record to the e-mail associated with the account, allow the patron to insert an e-mail address. It could auto-fill with the account e-mail, but allow it to be changed to send a record to someone else.
Instead of a subject line of "Bibliographic Records" autofill the subject line with the title of the record, with the option to alter, e.g. "to read" or "for Aunt Authra." And allow option to add a note.
A e-mail option more like that in WorldCat.