Looking for tilesheet for hexgrid

[AtlasSniperman]

Subject
I'm making a hex-tile based world map for my tabletop rpg. I have everything in place to algorithmically assemble the map, I simply need the tiles themselves to be assembled in this manner. Each tile represents a style of terrain/geography in a hexagon roughly 186 miles across.
[Here] is my current working tilesheet and an example of the current stage of how it might look;



Style
I'm looking for a tilesheet the program can pull from to assemble the larger maps. For Tiles I mean a generic icon on a colour matching the mood of the terrain. Like one would associate dunes and yellow/orange with deserts. Or Blue Waves with the ocean.
A couple of the tiles represent technically fantasy geography and aren't something that could be quicklisted here.


Quality & Size
I don't know about professionalism, but at least better / more cohesive than my horrendous attempt. Let's call it semi-professional.
The intent is for a digital rasterized image, 37 tiles of size 70px by 70px on a single sheet. Like a tileset for an RPGMaker game or Minecraft, but representing large sweeping generalised areas rather than; that patch of grass over there, that tree, etc.


Time Constraints
Technically no time constraints, but the personal anxiety-levels over the project would probably give me an anneurism after more than 3 weeks.


Copyright
I'd of course need the rights to utilize and reproduce the tiles for commercial use. I'm okay with the artist reserving the right to exhibit the tilesheet in their portfolio or even using it for placeholders or prototyping hex maps later.
Any work I put out including the art(either the full maps generated using the tilesheet, or individual reference hexes) will include artist credit, and portfolio link if the artist wishes.
Also, if you want, more than happy to put the artist as an in-canon cartographer in the relevant world as a nod to the work.


Payment
I can't pay much, but art deserves compensation and I'll do what I can to scrape together what's agreed!


Contact Details
I can be found on the associated discord under the name "Atlas", but you can also reach out to atlassniperman @ that email service that starts with g instead of e.

[Redrobes]

Good luck with your request.

If my memory serves we had a challenge years and years ago to do this sort of thing. We had to map the same area with different styles such as hex tiles. You might want to wade through the challenge archives going back at least about 10 years or so and if you find that then see if you can contact any of people who made some entries.