Hi Calvin,
I think the majority of parish registers prior to 1754 have not been transcribed yet (or may be in the process) by the Suffolk FHS.
I started to look at Philip Brett's entries to see if any info came to light but nothing was revealed.
You may already have the following details;
5-4-1790 Phillip Brett - m - Hamon [sic] Earl Stonham
28-4-1796 Haman Brett (w/o Philip) buried Earl Stonham
23-5-1797 Phillip Brett (wdr) - m - Audrey Palmer Earl Stonham.
21-3-1796 Thomas Brett (78) Labr Earl Stonham St.Mary
8-5-1796 Mary " (71) (wid) " " "
If these ages at burials are correct, will give a possible year of birth etc.
The Suffolk FHS do offer search services and to go back further you may like to visit their site at;
https://suffolkfhs.co.uk/shop/search-services.htmlDisclaimer; not associated just a customer of the FHS
Alan