It looks like LEGO Star Wars TIE Advanced Prototype (30275) will be available at to your local Toys R Us soon. The set recently got listed on the Toys R Us website. If you’re at the store and you don’t see it, ask an employee to look up “R”Web#: 238677 on their computer. The set will cost $3.99.
While at the store, be sure to also search for LEGO Marvel Super Heroes Electro (5002125). The item number for Electro is “R”Web#: 238428.