I need some sexy 46DDD bra's that are not too expensive, can you help me?

Hey, I can TOTALLY relate. I'm in a 36H now (after losing 60 lbs) and its IMPOSSIBLE to find decent selections that don't leave you feeling very very old when you look at them!  That is why I took a job at Frederick's of Hollywood when I was younger so I could see the markets choices first hand! A 46 DDD is also the equivalent to a 46F generally, so you may want to look at that size as well.
Here are a few sites that you may like and that your wallet may like as well!
Linda the Bra http://www.Lady.com-she's great and really understands.
One Stop Plus- I wanted to add lots of their bras, but had no room : ) They are fabulous and priced very very nice!
Finally, often I buy and sell bras on eBay. It may sound odd, but there are many buyers out there looking for large sizes and eBay is one way to save a TON of money. I usually end up pay about $12.50 a piece. See some of the auctions I've added for you. Just always check the sellers feedback score to make sure they are legit!

I really hope this helps. And I hope you find the sexiest bra out there!
Thanks : )

These sites should have some nice bras for you to check out! I like the gel in the shoulder strap for comfort, great idea! No reason to sacrifice sexy bras for just plain comfort why not have both! Enjoy!
Playtex Secrets Jasmine Embroidery Underwire Bra 4022

This is a well-made bra at a great price!

    * The molded Playtex underwire bra is constructed of stretch microfiber and mesh.
    * The full cups provide comfortable support for the fuller figure woman.
    * The delicate, embroidered lace cups are lightly lined to add shape, not size.
    * Wider straps for all-day comfort.
    * Leotard back minimizes back fat and provides enhanced support.
    * Shoulder straps are adjustable in back and have plastic hardware.