A selection of links to professional model builders and affiliated sites. painted people and figures for your layout.  
www.finescalebuildings.comDesigners and retailers of 4mm scale model buildings that can be purchased, downloaded, and then printed out and built. 
"C&L Finescale"Pete Llewellyn for a vast range of track building parts and much much more
"LNR Models"
Lee Robinson's excellent model buildings and graphics. Kay, Modelling details that matter.
Colin Dowling, Master loco builder Need something bigger than 7mm scale then take a look over at Woodbury Models.'s Minis: miniature 1/12th, 1/24th knitting patterns, yarns and knitting needles Rail Corporate Identity from 1965–1994 which includes a wealth of digitised examples of the British Rail design Anglia Railway Photo Archive and inspiration to some of our building kits.
www.warwickshirerailways.comThis site is created for the railway enthusiast, local historian and is dedicated to the research, study and recording of the history of Warwickshire's railways from 1837 to circa 1970. recommends QCAD. QCAD is a free, open source application for computer aided drafting (CAD) in two dimensions (2D)
Tim Horn BaseboardsIntentio recommends laser cut base boards by Tim Horn