As you know, U. S. Screen Print is out of business. A number of companies have stepped up to help owners of T-Jets. Some charge for support and others do not.
The T-BizNetwork.com website has a number of resources and pages of information for T-Jet owners.
Resource List - Companies offering support, service and parts.
Videos - over 40 training and maintenence videos on all machine models.
Documents - over 60 PDF files of assorted documents from machine manuals to support documents and much more.