Wait for someone to throw a gas grill away.
Then buy new parts for much cheaper online.
Mine is an old Fiesta Advantis gas grill 2 burner purchased in 2003. Last month I replaced the dual burner with igniter and flame shield with OEM parts. The grill is still sturdy and in great shape and the parts were $63 total. I can afford a new one but not necessary. I use a separate smaller grill for when I want a charcoal fueled cook.