Good plastic boxes for boot...

I am looking for a good sized box for the boot of the Cali where we can store boots, muddy rugby / footballs etc... Ideally fit the dimensions of the boot some 800mm deep, by 320mm tall and I guess some 400mm wide - though doesn't have to be that big, but some box which generally fits well. I have looked in all the usual places: IKEA etc.. but cant find anything satisfctory. Oh yes! needs to have a flat bottom so can slide out easily... Any suggestions gratefully received
Joe

We found some good sizes for the boot at B&Q by Really Useful Boxes http://www.reallyusefulproducts.co.uk/uk/html/onlineshop/fullrange_rub.php

Try "Allibert" do boxes in all shapes and sizes i have been using them for 15 years. you may have to search for a supplier.

Thank you Pippa / John.
I will look into both these options :-)