Don't know if you are looking for a new one or an old one but a friend has just had one from The London Door Company and it is lovely. And it has some sort of mental bolts in it for safety
If it was an old one fixed, sorry but I am so impressed with her door couldn't resist!
There are loads of handymen on here, we used the one on Webbs Road - Building Handyman recently but don't know if they do doors??