There are probably plenty of others but this one springs to mind. Wait for their Black Friday sales and you might make a saving (got to order from US). Or get Mat at UKHammocks to make you a double layer one (I can't vouch for level of service you may or not receive - I've had great stuff but also been buggered about).
In UK you have UKHammocks and Snugpak. They're the two that spring to mind though I'm sure there are others.
If you are tall as well as heavy you will typically benefit from a bigger hammock (hence suggestion of XLC).
Look on the hammock forums. Most of the US made ones are for big lads. I'm just over 100kg and have no fear of mine failing. It's a Nomad XL. Might have come from Ronnie Sunshines. They're easy enough to make though and then you get to choose the material, or use 2 layers. I use climbing tape for the suspension.
Only those who will risk going too far can possibly find out how far one can go - T.S.Eliot.
Hennessy Hammocks do a number of hammocks that are rated for people up to 300lb and 7ft https://hennessyhammock.co.uk/collectio ... bs#filters I'm at the other end of the scale, and have got a backpacker ultralight, really comfy, and easy to set up
I have just received an Easyhammock Classic. Only hung it once so far but all looks good. I bought the xl version, so 11ft length, and is wide as well.
They also do a double layer one which should add a bit more strength.
The website says they have tested up to 200kg, but rate to 120kg so a bit under what you are, but I think the 120 kg figure has a good safety margin on it.
The classic is uninsulated, but they do built in insulation as well. They are made to order so some customisation is possible, and uk made as well. http://www.easyhammock.co.uk