Graphics Changes - Create Banners from Existing Website Graphics

I've had a website header and ebook cover designed and I now need matching banners created, based on the current header and ebook design - the current graphics files will be provided to the winning bidder to work from. Banners required (size in px): 1 x 468w x 60h 1 x 120w x 600h 1 x 200w x 200h 1 x 728w x 90h 1 x 300w x 250h All files will need to be provided in jpeg format. Please note, completely new designs are not needed, all that's needed is for the existing header design to be modified in a way that it will 'fit' into the above sizes.