Don’t do as I did years ago and waste your time searching around elsewhere. UPVC Spares4Repairs have been in business since 1983 and know the industry inside out. If they can’t help you, the product you need likely doesn’t exist. I have dealt with Allan there since October 2015. He has a wealth of knowledge and has solved a number of knotty problems replacing older model window and door handles when other companies have failed. He always provides me with excellent service, sound advice and good quality replacement products – some of which having been made especially for them – and all at sensible prices!