Just to let you know that I am now able to do 3D printing of replacement and custom parts to order using a resin printer which provides a high quality product. So if you are looking for to replace a missing or broken part or would like to see if you can get other model railway items printed then please drop me a line at firstname.lastname@example.org with your requirements. This does not have to be Tri-ang related and can be any gauge. If you have already produced an .stl file then i can look to print that for you. I am sure you will find it is cheaper than using one of the web based services – ask me for a quote and see!
I also have a Patreon page for those who wish to help subsidise the production costs involved with making these parts – Patreon Link