This year, 5778, the last day of Pesach in Israel is on Friday. Is there any possible way that one could contrive to eat chometz on the shabbos immediately following Pesach?
As long as it's Pesach (i.e. until Friday at dark), a Jew cannot own any kind of chametz. Once Pesach ends, Shabbos immediately begins. A Jew cannot use money to (re)purchase chametz, and can't cook/bake any new chametz.
For this reason, even in Israel, observant Jews will use matza for their shabbos "challah" on the shabbos immeditaely after Pesach (known as the 8th day of Pesach in the Diaspora).
For Ashkenazi Israeli Jews, there is one way to make a clear distinction between the food on the shabbos after Pesach, and Pesach itself.
The custom of refraining from kitnyios on Pesach only applies to eating it. Ashkenazi Jews may own, do commerce with, and benefit from kitnyios throughout Pesach.
So, buy some Pesach-certified kitnyios food on Chol HaMoed. Once shabbos starts, break out the rice, corn, beans, have a festive kitnyios meal!
For shabbos lunch, I highly recommend a salami sandwich, on matza, with MUSTARD (another kitnyios item).
Since this question only applies in Israel, I must disagree with msh210's suggestion. Here in Israel, there is a high probability that the fresh chametz product came into existence with at least some forbidden assistance from a Jew. Even if it came from an Arab-owned bakery that is certified kosher - that kosher supervision doesn't apply on Pesach! So, you can't eat it because it wasn't under kosher supervision at the time it was baked, so you have no way of knowing what exactly is in the chametz product.
Per the Yalkut Yosef 448:5:
It is permitted to eat Chometz on a Shabbos which is immediately after Sheviyi Shel Pesach - there is no Muktza involved, and if it was sold to the non Jew according to Halacha you may eat it on the day of Shabbos immediately after Sheviyi Shel Pesach. However you have to be extra careful not to take the chometz on Sheviyi Shel Pesach since then you will be prohibited to eat it since you have done Baal Yiro'eh U'Baal Yimotzei. (Yechave Daas 2 Siman 64, Yabia Omer Orach Chaim 9 Siman 46)
מותר לאכול חמץ בשבת שלאחר שביעי של פסח, ואין בזה איסור משום מוקצה, וכן חמץ שנמכר לגוי כהלכה, מותר לאוכלו ביום שבת שלאחר שביעי של פסח, ולא אמרינן מיגו דאיתקצאי בבין השמשות במוקצה מחמת יום שעבר. ובלבד שלא יטול מהחמץ בעצם יום השביעי של פסח, שאם כן הרי הוא עובר עליו בבל יראה ובבל ימצא. וגם הוא חמץ של ישראל שעבר עליו הפסח שאסור בהנאה.
This year my Rav, Rabbi Yaacov Haber, specifically dealt with this question in a shiur. He mentioned that according to the contract that he signs with the non-Jew, there is a specific clause written in that if, after the completion of Pesach, the Jew wishes to partake of his (the non-Jew's) chometz, he gives permission to do so, and the value will be deducted from the amount owing upon collection. Therefore it is permitted to partake of chometz that you sold to the non-Jew on the shabbos following Pesach, so long as this clause was in the contract of sale.
Muktzeh is not a consideration, since the chometz belongs to a non-Jew, and a non-Jew's property does not become muktzeh.