Try having a course of CACI facials - they are not cheap (£40 per session) but I have just finished a course of 10 for my wedding and the results are amazing. They use an electric current to work out and and tone the muscles in your face and neck (a bit like taking your face to the gym). You lose weight from your jaw line and cheeks and it tightens everything up. I strongly recommend you try this before surgery.
Good luck - and well done on losing the weight. I bet you look fabulous...
There are creams that can temporarily tighten skin a little bit but really loose skin on the neck can only be solved by surgery. I wish there was a magic cream that took care of this but if there was, a lot of people would be using it like mad.
Congrats on losing the weight though - I'm sure you look so terrific that folks don't even notice the neck.
You Can Do Exercises Instead Of Going Under The Knife!
Try Sticking Your Neck Out 10 Times In The Morning And At Night, Like A Man When He's Shaving. You May Feel Stupid But It Works!
Also Chewing Gum Works Your Jaw Muscles And Has The Same Effect.
stand straight, arms by your side head held high and stick you lower jaw out as far as you can (as if pulling a funny face). you will see how the skin of your neck is streched.