The Marbelup Models web site currently list 10 items of rolling stock. In addition, two brand new models which will be unveiled at the Perth Exhibition this weekend, and added to the web site next week. While these models are clearly not RTR, they require considerably less work to complete than a typical kit, albeit at greater cost.
I won't have models for sale at the Perth Exhibition as I am part of a non-commercial display and not permitted to sell. Details of how to order are available on the web site - http://marbelupmodels.blogspot.com.au