Dear Sirs,

Thank you for your inquiry.

The MT-DE10 mounting ring you mentioned is an item that can be used to raise the pickups.
https://shoppartsland.com/dog-ear-pickup-mounting-ring-mt-de10/

Additionally, there is another item available: pickup cushions for P90 dog ear.
https://shoppartsland.com/pickup-cushions-for-p90-dog-ear-1/

You can choose and use them according to the contours of your guitar body.

If you have any questions don't hesitate to let us know.

Best regards,
poul – Production manager

ROSWELL PICKUPS.