How much do you think you need?
The decals that come with the Academy pretty much cover the basic deck and helo pad area. You will need a 30 in 1/350 scale and those are available. You also need REID for the stern. Sometimes you can make that up from copyright letters and notes on a decal sheet.
For a basic set with hull #'s try this:
https://freetimehobbies.com/search/searchresults?search_query=1%2F350+decals
BUT, for a full set designed for the Perry (long hull) class:
http://www.hawk-graphics.com/
You may not find a Decal for the Stern as "Reid". You might have to locate individual letters to make that up. The Hawk Graphics decal is the best. It has most ships names and individual letters too.
There are plenty more styles on eBay and that could be a better option.
Nino