[AllHailKingVolvo]

Try the parts department at your local Volvo dealer-they will be able to get you a fitting kit for around £37 from their Classic Warehouse. There are two varieties of back box hanging strap, one with the straight lugs and one with offset.

I've just fitted a full Volvo cat-back exhaust kit to my 940 and the fit and quality of the OEM parts is significantly better than the pattern bits available elsewhere. I've never found it so easy to fit an exhaust-total job (removing the old one and fitting the new) was 45mins. Slotted together like butter with zero bodging required!