Been looking around for one of these to use so I can leave my bicycle 7 tarp set up with ridge line etc and stuff it into a bag from both ends.

I want one with draw cords rather than than fold-over ends with a capacity of around 1.5 litres.

Can not see anything using the internet with the exception of one from dutchware in the US.
Has anyone seen anything similar available in the UK?

I can make you one if you want?

If Stu's offer doesn't sort you out try Mat at ukhammocks.co.uk and/or google "bishop bags".

As Tim say's, a bishop bag is what you need.