6 speed diesel dual mass to smf: 6 speed SMF flywheel are expensive off the shelf, i know where to get them for about £250 mark new but 100% do NOT fit to a diesel. Makes them noisy as hell on idle.
6 speed diesel box: Don't buy it from a breakers, ive bought 3 on ebay for £50-£150. All have been good boxes, 1 had only done 25k miles.