If you live in south London, I might be able to put you on to a person who makes loose covers.
Here in Oz I wanted a 2-seater sofa re-covered and the chap wanted $750 ( materials extra) AND for me to bring the sofa to him and take it away. By way of contrast) the lady who did mine in London came to my house and took 5 minutes to take measurements and 3 weeks later turned up with perfect covers, which I'm still using.
Bugger that. I went straight to an opshop and bought a very good sofa for $100, unmarked, no scuff, no stains. About 3/4 years old I'd say. Zipped covers so cleanable. To be fair the opshop is an a wealthy area, so the standard of furniture is good.
We've just redone our living room and have three sofas and chairs in various shades of brown which now look awful in the new room. Only problem is that we've run out of money to replace them, and as DH points out, they're perfectly good, I just don't like the colour any more.
So, I've seen this which I love. The existing sofas are fairly standard, boxy shapes, so I'm thinking that I should be able to buy some ready made throw on covers which would give a similar look at a fraction of the price of new sofas.
Does anyone know where I could find something? The sites I've found so far have been a) chintzy and b) expensive.