Wheel spacer or offset spring shackles

If you can do 3/4” then you should be able to find the spacer/adaptor style in that thickness. That saves you from changing out the axle studs. Obviously it gives you two sets of lug nuts to check but I prefer those to a giant plain spacer.

You’re not gonna find anything hubcentric, you’ll need them custom made if that’s what you want. Another reason to go with the style that has their own studs