I need an editable Mockup of banner images. !! UK ONLY !!!

I need someone with experience of creating Photoshop mockups, perhaps you sell them on Envato?

Take a look at the attached banner design I created. What I need is for the two images behind the button to be easily editable so that all I have to do is click on the images, replace them and it save those new images to my banner. I could do this with 'smart objects' but one of the images is rotated a little and I DON'T want a Photoshop "action", THIS HAS TO BE LIKE ONE OF THE MOCKUPS YOU CAN GET ON ENVATO: click, replace, save. Ideally the images themselves could be saved as a PNG as the rest of the banner has been coded. You'll need to include the word "sunflower" in your quote so I know you've read it.

If you don't understand what I'm asking for, don't bid.
Preference will go to someone who's done stuff like this before.