If you are truly serious about your 45’s game, then these gorgeous custom-made boxes from BrewertyTown (based in Philadelphia, US) might be the ultimate.
Made from pine with walnut trim. Features recessed handle, one butterfly latch in front and removable hinges at the back and protective corners (black hardware) Grey foam interior. Some models fit approx 40-50 records and the biggest one around 80.
However, the words “custom” and “quality” are generally accompanied with a fairly expensive price tag (£161 – £215). However, you should keep in mind that these might be the only boxes you ever need to store your most prized 7″ gems.