Kits can be had for contemporary stock, though not necessarily the all the latest units, from the likes of Bratchell, DC kits and Britannia Pacific Models. However judging by the number of hits in searches they don't seem to have a great following on RMWeb. All three companies make some sort of provision for applying modern multi-coloured liveries, which may, or may not, say something about the level of skills required to produce well finished model of modern stock.