I have to install a doorway transition which includes a sliding (pocket door). The transition is from carpet to hardwood and the heihgt difference between the top of the hardwood floor and the carpet pad is 1/4". The Hardwood floor height from framed under floor is 1/2". There must be clearance for the door to close. Are there pre-made transition pieces that I can buy? If not, I would appreciate any tips on making them or modifying baught ones, and installation tips as well. Ira.