Another way to insert the long dash. I emailed DBT and got the following information.
In the DXP file place your cursor where the long dash needs to be. Then using control+] (closing bracket) you will get a screen that will allow you to insert the DUSCI code for the long dash. In that box type ec45 and then OK. Then Ctrl T to translate and you will see the UEB long dash.
DBT has added this symbol to their list for the next DBT version.