I'm not an expert on 3D printing but looked into it a while back. There are a wide variety of materials available now, some supposedly pretty durable.
Also, as part of the printing process, you can choose different densities for what you're making. It can look like loose honeycomb, scaffolding type of structure to solid so that will make a difference in the durability.
I have access to a printer at one branch of our local library. I was trying to take a class on a software program at the same place but the guy who was teaching it left. Coincidentally, I was just going to contact them this week to see if they'd gotten anyone else to do them. I played around with the software but really need some basic instruction on it if I want to do anything with it.
There is also a website where people post things they've made and include the files. I didn't see any pods on there about 6 months ago but I'll have a look again. There were a lot of BMW things on there though. I was hoping to find side covers and a few other thinge but never saw them.
There were also some posts on ADV and a couple of guys there were printing things but the posts weren't super current. One guy was really good at the design part.
Additionally, there is a way to produce things via photography. There are cameras that will do this but the good ones are very expensive, the consumer level ones are not so easy and are a lot of work. That was another thing I tried but couldn't get decent results and thought about looking into again to see if there have been any advances in the last 6 months to a year.