Is there a way to bypass the 5MB or 10,000 row limitation of the attachments in a saved search email via scripting? It doesn't have to be a saved search anymore. Could be a suitelet or something

Yeah you could run the search paged in a script then generate your own csv file that way

If you just want an email. Then creating a scheduled / map reduce will be better. Where you can fetch the data from search and create CSV on your own and email it. Even then I believe you will have a limit of 10 MB per attachment and can send multiple attachments till 20 MB.

About 20 MB per file or a total of around 1GB for 50 files. So I guess even scripting can't solve it?