The people who lived here previously put in a Home Depot modular kitchen with black granite counter top and back splash. The flipper who took it on after they were foreclosed on. Admitted to my face that there was a much bigger $1200 gas cooker in there when it took it and that he put in a cheaper smaller model and boxed in the gaps between the new cooker and the cabinets. So now there is open space between our cooker and stove on both but we can't reach it from the front. There's not even a side wall along side the cooker. It's wasted space. And I came across those space filler solutions on Home Depot. Thought that would be a good idea to improve storage in our kitchen. But the space fillers state you can only install with a new kitchen not pre existing. Is there anything like that we can install easily ourselves hat is similar and can be added to our new kitchen. And budget friendly?