I'm compiling a list of websites for people and companies providing a variety of helpful model railroad-related services. Please contact me with suggestions for additions as I build this page out.
Other Directories
The UK Model Shop Directory: https://www.ukmodelshops.co.uk/
Custom Weathering and Graffiti Work
They Make It Like That: http://theymakeitlikethat.com
Pro Scale Models: http://www.proscalemodelsco.com
Gavin Faivre: https://www.fiferhobby.com/fhs-weathered-cars/
Robert Johnson flyingcrow@yahoo.com
N.Scale_N.Such: nscale.nsuch@gmail.com
Custom Locomotive and Rolling Stock Work
Model Railway Backshop (specializing in Brass): https://www.modelrailwaybackshop.com/
Layout Design Work and Track Plans
Journal of Model Railroad Design: http://www.jomrd.com
Layout Vision: https://www.layoutvision.com/design
Shelf Layouts: https://www.shelflayouts.com/design-services
Rail Dreams: https://raildreams.com/about/services/
Bob's Track Plans: https://www.bobstrackplans.com/
Model Railroad Designs/Dubai Trains: https://modelrailroaddesigns.com/
Cke1st's Trackplans: http://www.cke1st.com/m_train2.htm
Electronics
Apollo DC Controllers: https://www.apollocontrollers.com.au
Passenger Car constant Lighting: https://oshpark.com/shared_projects/nhkZ6OzP
GATR Works FREDs and EOTs: https://www.ebay.com/str/gatrworksfredsandeots4trains
Layout Building Work
Stephen Lamb: http://slatrains.com/
Shelf Layouts: https://www.shelflayouts.com/design-services
Rail Dreams: https://raildreams.com/about/services/
Rasch Studios: https://www.raschstudios.net
3D Printed and Laser Cut Models
UKSTL: https://ukstl.etsy.com/ (model railroad and gaming models)
HD Custom Design: https://www.ebay.com/sch/i.html?ssPageName=&_ssn=hdcustomdesign
Cash Money Enterprise: https://cashmoneyenterprise.etsy.com & https://www.ebay.com/str/cashmoneyexpress
Budget Model Railways: https://www.budgetmodelrailways.co.uk
Kurt Lakin: https://www.thingiverse.com/klakin/designs
Baldylox Designs: https://www.etsy.com/shop/BaldyloxDesigns
Calvin Witt: https://www.etsy.com/shop/calvinwitt
Calvin Witt: https://www.shapeways.com/shops/calvin'screations
Penguin 3D Workshop: https://www.penguin3dworkshop.com/s/shop
Laser Cutter and 3D Printer Files
DIY and Digital: https://www.patreon.com/diyanddigitalrailroad/shop
Rober Collins: https://cults3d.com/en/users/RobertCollins/3d-models
Also, search for 3D models and STL files at:
General 3D Printing Services
https://craftcloud3d.com/ (upload your files, select material, color, provider, etc)