I bought a Mountain Equipment K7 recently for winter trips in the Whites and bigger mountains on the horizon. I should have sized up to account for layers and the UK sizing - it's a men's L and I need an XL for a belay jacket. This jacket is extremely high quality and has only been used on a few trips. It's like wearing a sleeping bag. There is no damage - like new condition. 

I am looking to trade this jacket for a comparable one (fully baffled, ~300g of down) in Men's L or XL if it's a UK brand. Looking for MH Nilas, Rab Positron Pro, Montane Alpine 850, or similar. I would happily trade for the same jacket in XL if anyone has the opposite problem.