This guy has some good stuff for carriages: http://www.justtheticket.tv/index.htm
COACH BOGIE KITS.
These kits have been developed to produce an easy to make cheap bogie unit which can be adapted to suit any company with a pair of fully compensated bogies, incorporating adjustment at one end to allow for superelevation and indifferent quality tracks.
The kits now come complete with wheels and a choice of bogie side casting (now merely decorative) although any wheels or castings can be used.
The bogies are made up with strips of nickel silver which are cut to size and folded for stiffening. They utilize nylon bearings and the bogies turn on brass pivots, one end being slightly tapered to allow longitudinal twist.
Kits compose the following:
Nickel silver bogie sides, ends and bolsters.
All screws and nuts, nylon or PTFE axle bushes.
set of instructions
GWR 9' GWR 7' Fox 4 wheeled
GWR 9' Dreadnought GCR LMS Pullman
Basic material Kit ‚Ä" drilled, folded ready for assembly ¬£8.00 per pair
Kit complete with Slaters wheels and PTFE bushes ¬£22.50 per pair
Kit complete with wheels and white metal castings: ¬£27.00 per pair
Wheels only including PTFE bushes. ¬£7.30 per bogie
Bogie side castings: ¬£4.40 per set.