Hi, I need to get the plastic lock caps for my upvc door hinges it is the one's that fit in like an alan key any help in where I can buy them would be great. Thank's in advance

Try the window/door suppliers.

The Windows supplier should have spares. However if they don’t or they can’t get hold of any try going direct to the manufacturer or the manufacturer of the profile your door is made from. Most suppliers use different hinges so you need to know who made your door. Failing that if you still have trouble, get back to me as I have a few spare here and I could send them out free of charge, then you could see if they fit.