Hi Jollery,
Well, I'd say Wansted was a pretty good place to start trawling through Parish records if I were you. As they married & were born pre registration in 1837, that's your only option...I think.
If you're not in that area, I'd start by Googling for Wansted i.e., online records, archives, anything at all that could help you. The local studies centre or records office is your best bet of where to find the PR's.
Happy Hunting...oh, did you try familysearch.org?
Debbie