Here is the link to Hydro-turf. I always get the diamond pattern in black. It seems to have better traction than the Cut groove. You can also check for their "B side" which is blemished mats. They can be cheaper. A piece of advice, get the 3M adhesive. It will help keep the mat down. Make sure you still use silicone around the edges and through the middle, but the 3M will help hold it all across.
I don't really take many pictures of my swim platform, but here are some you can kinda see. The first is the stock old mats from the Saltare.
Here is my old Mariah.
I also used the excess for traction points on my trailer.
Hard to really see it on my Saltare.