It's just a big jigsaw puzzle with bits missing!Sometimes you find the bits and sadly sometimes you don't.
You may have hit your brickwall especially with common names but start with what you know. Have you found them on any of the census? What were the names of their children? Did they have any unusual names? Did they have strange middle names? Sometimes these are passed down and are usually a maiden name of a mother, grandmother etc.
Family search has scanned copies of original documents from Norfolk and I found the parish entry for James Harris and Elizabeth Parker the witnesses were Richard Harris and Aaron Ward. Who were these people? Were there other Harris' and Parkers getting married about the same time in Limpenhoe? The parish couples married in was usually the brides (although not always of course).
To view originals go to their new websitehttps://familysearch.org/
scroll down to "browse by location", click on "British Isles";
scroll down to "England, Norfolk Archdeacon's Transcripts, 1600-1812" click on this then "browse through.records" then "Norfolk" and you will be presented with a list of parishes, scroll to Limpenhoe and on page 95 you will find their marriage. If you browse the images you may find some more links.
When people move from one parish to another there is sometimes a settlement record. If you search A2A you may be lucky!www.nationalarchives.gov.uk/a2a/
Don't give up, just try some lateral thinking. Try following siblings, or in laws.