You can't always get what you want. Luckily, if you can't find what you're looking for, there is an opportunity to order it.
A public 3D Project
Simply click on CGTrader Freelance 3D Projects and select Post a Project. You can request a custom 3D asset with an option to set required poly count, type, model format, deadline, budget - and every other little detail.
Add a visual reference, even if it is a crudely drawn sketch, to make it easier for thousands of designers to know whether they're up to the task.
A private 3D Project
If you find a designer who has the perfect style for you, you can offer them a private project by clicking the Hire me button in their profile (just below their name and profile image). If the Hire me button is not available, you can still message the designer directly to ask whether they are interested in your project.