WANTED: Info on replacement sling swivels for a Mauser M03 Extreme.

I have a Mauser M03 Extreme model, the plastic stocked model. It has fixed sling swivels in the butt and on the front end of the fore-end.

I am interested in replacing them with detachable sling swivels. Anyone know of any replacement swivels which would work?

It may be a simple matter to replace them, but first just asking if anyone has replaced them and what they used.

It seems silly to me for Mauser to use fixed swivels on such a rifle today. The fore-end might look at bit silly with a swivel stud facing forward on the fore-end though when the sling is not attached.