Since NSF changed from Fastlane to Research.gov, the submission systems flags errors of format, margins, text type and size, etc. The old current and pending support form does not pass muster, and it seems no one else has an updated version, at least that I’ve seen. I decided to make one, and it uploads with no errors (as of today, 1/22/2019). I hope this can save someone out the time it takes to reformat it.
I make no guarantee this is completely correct, but it follows the now archived NSF Form 1239 and current GPG section identified on the document.
Word 2016 document: Current and Pending Support (Revised Template)
PDF version showing final appearance: Current and Pending Support (Revised Template)