What you've described is certainly possible, but wouldn't be allowed on the SDN (https://osbot.org/forum/announcement/62-script-rules-read-before-applying/)
That being said, there's nothing stopping you making it yourself / purchasing it as a private script. If you do go for a private script, expect it to cost a lot!
OSBuddy provide a nice and pretty accurate item value db which many of us scripters use for profit tracking and the likes. This reddit thread might help: https://www.reddit.com/r/2007scape/comments/543n8b/rsbuddy_exachange_api_documentation/
GL!
Apa