Here are some other good sites for Trainz content. (Note: List is outdated, some sites might be closed)
http://thesudriancommunity.jimdo.com/
http://sodorrailroadingbuilders.jimdo.com
http://northwestrailways.jimdo.com/
http://sodorislandroutes.jimdo.com/
http://sudrianrailways.jimdo.com/
http://wildnorwester3d.jimdo.com/
http://thedirtytrain1.wix.com/simplysudrian3d
Find Matt and Nathan's future content here: https://www.themarvellousmainlandmodelworks.com/