As i said in the other thread, £20 completed my 4ft * 2ft *2ft vivarium + £10 for a tile cutter plus they delivered on a bank holiday as well for no extra charge than the original deliver cost. This was with Topps Tiles!i wouldn't bother with topps. overrated and expensive. try b&q or wicked. if you have a tile stockist or bathroom showroom near u, pop in and ask if they have some end of stock tiles laying around, or odd tiles.
Considering i dont have a car i cant speak better of them!