what's the difference in sizes? ...is the new combination shorter, taller etc if the old doors and counter are in good condition will the wire drawers (with side tracks available with flat pac systems at Bunnings or Ikea) fit inside your current cabinets with the existing doors? did you hope to reuse the existing counter? subject to sizes could a section of drawers (in a different colour?) be substituted for a part of the cabinets under the existing counter? do existing cabinets have holes to add extra shelves (a few extra internal shelves, cut to size, should be reasonably priced from a local cabinet maker) and use cheap plastic baskets to sit on the extra shelves to rearrange existing storage ...best of luck

Photos of the kitchen could help. I would ask about the 10 yr warranty and how that might apply to help you, but I guess that only covers wear and tear

We have a wardrobe/cabinet maker in our area and when we wanted to fit draws to an existing pantry he said they just add a timber beading for each drawer down both sides of the cabinet that the track fits onto, this also helps if the cabinet doors can't open wide enough to slide draws out

You could have the draws made by a wardrobe cabinet maker to fit exactly as we did in another situation and they were cheaper than Bunnings, Ikea

This is the company

http://www.ezyrobe.com.au/Site/Pages/Page.aspx?Key=1

You might find one in Sydney? cheers

Good luck let us know how you get on, these people were really helpful, they even installed the draws at no extra cost.