When I was a Rockape I had a proper officer's beret from Gieves, of the type that I suspect you dislike, heightsgood. If you purchase an airman's beret and sew on an officer's wire badge then you are going to end up with a hybrid, but then as you are a civilian I suppose nobody can stop you.
Lost my beret somewhere along the line, and obviously never wore one as aircrew. Never wore a chipbag either, just a very nice Bates SD cap for best and an old tatty one to take with me when flying.
Incidentally why did the RAF call the sidecap a forage cap? Traditionally in the army a forage cap is what we in the RAF call the SD cap - what we called a forage cap is known as a field service cap in the army. I suppose as they got there first they are right and we are wrong! Strange.