Hi everyone, this is my first post!

Exactly what it says on the tin!... can anyone tell me where i can get a bag for my Yamaha FG730?

Whether you want a soft bag or a hard case, the Yamaha FG730 is a standard dreadnought shape guitar so your local store should have them in stock or be able to order one in if they dont.
If you cant make it to a shop then you should have no trouble finding one online either. I dont know of any online stores in the UK (except ebay) but im sure youll find one with a bit of searching.