Can anyone recommend somewhere (in London or online) to buy a wrought-iron gate?

[TadlowDogIncident]

We're in an Edwardian semi, with a wrought-iron gate at the bottom of the front path. It really needs replacing as it doesn't have a catch so can't be secured, which isn't safe now DS can move around and could shoot out of the front door and into the road. It's a conservation area so we need to replace it with something that looks right. Had a look online and there are a few companies, but all of them illustrate their sites with massive carriage-drive gates, so I don't know if they'd be interested in our little pathway! Can anyone recommend anywhere?

TIA