I had a register office wedding.
I was clueless about what to wear, but was leaning toward a cream or pale pastel suit... it was my 3rd marriage, and i definitely wanted to keep things simple.
I ended up finding a dress in Allders on the sale rack... £120 marked down to £60. It was a bit fancier than what i had been thinking, but it ended up being lovely, and perfect for the day. It was a cream/magnolia colour.... long sleeved lace bodice (lined), and a 2-layer sheer skirt, tea-length.
Keep looking... hopefully the right dress will find you!