We have a cavity slider door which needs replaced as while we are doing the ensuite reno the sub floor has been raised to allow for screed with fall to drain etc so now the current door is to tall by about 5mm. Can you order custom sized internal doors in store? The Hume internal standard door 720mmWx2040mmHx35mmD matches what we have now but we need about 15mm off it. So looking for 720mmWx2025mmHx35mmD replacement door with the groove channel out of the bottom.