The 5Dimes website is back online as of 3pm BST today.
I did have some trouble logging in at first, but have been able to access the sportsbook now.
As you can see above, I've finally been able to look over the SummerSlam 2017 markets. The prices are the same as they were yesterday night.
The company's WWE odds are found under 'Other Sports' on the 5Dimes Website.