I have not been able to connect to GenForum as well and I know another individual who helps folks out there too who has not been able to access it either.
I have requested some obituaries and the marriage certificate for him and Ida. I haven't been able to find much yet on familysearch.org in regards to Frank. I am still trying to figure it out even though I have used it before. I haven't gotten the nack yet of searching with different names, etc. and I don't know much about the country to figure out where to search in.
I could try to get his Social Security application, I don't know if it is something available to the public. I also sent a request to the U.S. Department of Homeland Security genealogy department to see if they have anything on him.