The custom report writer can be used to create customized delimited outputs. When using the custom reports options — the format will reflect the arguments + delimiter. So, for example, if the delimiter should be a tab — you would use:
{050$a}\t{090$a}\t{245$a}
When working with this option, you can pre-format data prior to export by using the .regex option. Please see: Custom Report Writer: Formatting Options