Never had that problem. I use a Topeak Aero Wedge (have small, med and large - and it really is) but all strap on, so can't comment re the quick clip. I think they look quite good on a road bike, the strap on ones can be pulled close up to the saddle rails. The medium is actually quite big and holds all I need in the winter, as it can expand. Perhaps only complaint/s - not very waterproof, and mine has faded badly - now more purpley blue than black.
I think
Halfords stock them - so maybe you could look at one there.