And I'll soon Upload the APK from the Verizon LG G2 that has this feature. I don't know what it will break (if anything) and you will need Root and a file explorer to copy the file over.
Attached Uploaded files here.
The Name is LGUSMms.apk. So you will probably need to rename it to match whatever your existing MMS apk is named. Also the SMS portion, which may be needed to call the MMS apk is named VZWSMS (Verizon SMS). So it seems it is specific. This will also probably need to be renamed to match your existing Messaging.
I had to ZIP the files because of the size. So you would just unzip and manually move into: