There are several options when it comes to your request. Motherboard manufacturers publish information on what RAM is compatible with motherboards on their websites. Here is the link for your particular board:
https://www.msi.com/Motherboard/support/B350-TOMAHAWK#support-mem-12
Make sure that the "Memory by Rx-1x00" link is selected at the top.
From there, you can look for RAM that supports the speeds you're looking for. Keep in mind, you will have to overclock the RAM via your motherboard to achieve your goal of 3000-3200mhz.
You can copy/paste the product numbers from the table in to google and it will take you directly to the kits.
For example, here is some RAM that can achieve what you're looking for...