Bra help please

I like to cross dress and use a 40D full cup bra usally with a silcone breast insert or homemade bags of birdseed in old tights. Its give me great deal of pleasure over the years when I dress up in my underwear.

Recently I've learned how to tape up my chest to give me a clevage and a better look. First impressions are good but now the infills seem wrong and big.

Do I need chicken fillets or different types of padded bras?

Many Thanks

G xo