Finding a cheap wedding dress other than white or ivory can be a challenge, but since I dont know the area you would be shopping Im limited to only online ways to find your dream dress.Both of these sites should lead you closer to finding the perfect dress for your perfect day Congrats on the Engagement!

You could also check out the "special occasion" dress sections at the big department stores for a formal a line wedding dresses in purple that is not specifically a wedding gown, but might be what you are looking for.I think that a purple wedding gown would be fabulous (especially because purple is my favorite color, also!). If you do an internet search for "purple wedding gown", you will find many sources for colorful wedding gowns. Many bridesmaid and prom dresses are formal enough to be worn as a wedding gown, and you could definitly find many options of these in shades of purple.

Ebay has listings for purple wedding gowns, and there were some beautiful ball gown wedding dresses there, when I checked. In looking on the internet for purple gowns, I came across several white or off-white wedding gowns, that had purple accents and detailing. That would be beautiful, too! Have fun planning your wedding! Best wishes to you!