A Dedicated SSL certificate is just a term from us to differentiate between shared ssl and dedicated ssl. The right term for dedicated ssl is called as SSL Certificate only.
We do sell SSL Certificate from Thawte and we are the registered reseller for their certificate. There are few type of SSL Certificate that is available for purchase. You can purchase our SSL Certificate from our site at :
https://services.seekdotnet.com/cart.php?gid=4
