From the obituary for Hans, we can now tell the obituary I found listing Jane as a survivor is the correct Jane. It shows her husband's name and town where she lives. She is (or has been) a school librarian. You can find an email address for her by "googling" her name and town.
Best of all the obituary Homer got shows where Judy has lived.
Here is the address for the cemetery where Hans is buried. If his wife has died, the cemetery can tell you if she is buried with him.
Lawn Haven Memorial Gardens Cemetery
1601 East Llano Estacado Blvd
Clovis, Curry County
New Mexico, USA 88101
Phone: (505) 763-3814
On this link (Find a Grave) you can request that a volunteer take a photo of the grave:http://www.findagrave.com/cgi-bin/fg.cgi?page=cr&CRid=38179&CScn=Lawn+Haven+Memorial&CScntry=4&CSst=34&