Hi Lensmeister, went to the Sussex FHG library today and looked but really not much luck I am afraid.
I checked Balcombe baptisms 1642-1743, Ardingly baptisms 1558-1690 and West Hoathly baptisms 1606-1678 but no Adrie/Audrey Gib/Gibb/Gibbs mentioned. There didn't appear to be a break in any of the above records. I then checked the whole Sussex FHG baptism database for the name anywhere and there were no entries.
There were 2 Audrey Feldwick burials at West Hoathly though, 1737 and 1755. You might have this info already but without any other info impossible to tell which one relates to your Audrey neé Gibb.
Knowing from what jonw65 said earlier that she had a brother William I checked for baptisms of William Gibbs' in Balcombe and came across:
William Gibb bapt 28/2/1650/51 son of John Gibb at St. Mary, Balcombe.
Also baptised there, children of John Gibb were:
Ann Gibb bp 2/1/1641/42
James Gibb bp 9/3/1654/55.
Hopefully some of this will be helpful.
I suggest you look at joining the Sussex Family History Group as then you will get full acess to the transcribed baptism and burial records and various other information.
www.sfhg.org.uk and you will also be able to see their list of publications. Most sussex parishes have a CD containing parish register transcriptions and surname indexes for around £5 per CD.
Also, not sure if it will cover your area but there is The Weald.org site which might be helpful.(West Hoathly is definitely included).
Regards, Pheno