Join Date: Oct 2017
Location: West London, UK
Personally, I wear a pair of Resurgence jeans which are really comfortable and give really good protection, apparently, with proper armour in the knees and hips. They are a bit on the snug side. I'm nowhere near your size and have no idea if they do any that would suit you. I had a pair of hood jeans ages ago, but didn't really like them, fit, comfort and protection wise, but I've no problem with these.
I understand Rokker is the top of the line for bike jeans these days and looking at the motolegends website, they do a good range of leg lengths. A bit pricey though.
PS, motolegends is a cracking shop and it's well worth a visit to their Guildford branch if you're in the market for some bike gear.