Welcome, Ray.

Did you lap your stones?

As said you can use any Diamond Plate they run from $30-100. For lapping stones, they all work about the same in the same grit range. You want a 300-400 grit stone or 320-600 wet and dry sandpaper and any flat surface.

Make sure you read the three posts linked to in the first post of the honing forum. There is a lot of good information that will answer a lot of your questions on how to hone.

Also read the Library/ Maintaining Razors/ Honing/ Beginners Guide to Honing for more information, or better yet find a local mentor.

Make sure to use tape on the spine until you master honing.