Hi Kevin,
You can use Quest Web Parts option from the Central Administration (under General Application Settings) to manage QWP (make available) by web app, site collection and multiple site collections.
Select all of them except the SI wps and hit Ok.
If you want to delete the dwp SI web parts files then you can go to Site Settings ->Gelleries -> Web parts and delete the files from there.
PS
I responded to your direct email but it looks like you didn't receive it.