I'm looking to replace the internal doors on my property. Ive just gone around measuring up and it seems i have 24", 27" and 30" (all 78" high)door ways. I've got a price on some Oak 4 panel veneered doors (as you'd see in Wickes, Homebase, B&Q, etc but they only have them in 27" and 30". Where can i get a couple in 24" at a fair price?