That's too large a request for this forum. Resource requests is for 1 - 2 little things, not something huge like a full tileset. In general, when it comes to tilesets, you have five options:
1: Buy a DLC which has it.
2: Recruit someone under project recruitment to make it for you.
3: Make the existing tilesets work somehow
4.Pay $$$ to get someone to make it for you. And exclusive tilesets are not cheap, they will run you on average $20,000. Which is also why someone will not make it for free either, considering that high of a value is on an exclusive tilset.
5: Do without.
I'd suggest seeing if one of the DLC's will work for you, or seeing if you can improvise with the RTP. I managed to do that to make a Magic school in my game, completely with the base RTP. Maybe start by trying that?