I have a pair of S3 Diff brace bars, tig welded, powdered coated in satin black, fully adjustable with high quality rose joints, These fix to the sierra diff at 10.00 and 2.00 o'clock with the supplied 10mm bolts, plain and schnoor washers. The top mounts bolt onto to the pair of top seat belt mounts with longer seat belt bolts and a nylock nut.
Mog Racing charge Euro 474 for very similar units, I would like £150 inc p+p which is far cheaper that a broken diff mount. Ideal for race, sprint and high powered road cars.