One thing you can never find online is any models of irrigation instruments or taps even garden hose fittings. I’ve always wanted to model pop rivits or coaching screws to use with the bolt generator in inventor but never had the time to model. Always looking for models that are over looked.
I can also offer an infinite number of electronic components. I can't even imagine how many years it would take to model all of them. Many users here are already working on this task. You can join in.