If you can't find any locally, 'Paper' a member here on the site usually has some in stock he sells. He is where I got my first one from. Hope this helps.
I'm out.. My last three migrated to Canada..
Check out your area Walmarts for the covers. I've never seen any here in the Midwest.. Last week I was in Zachary, LA and they had almost a dozen of them, but I was already getting charged for too much luggage for my flights, and I happened to be travelling with my boss so I didn't want to have the company get charged another $100 for excess luggage for bringing home seat covers..
I've purchased them in this Walmart before, so they're restocking them. I also bought a bunch in VA. If you know someone in the South or Southeast, see if they can't pick you up one and have it sent to you.
Murphrm, check around in your area. I think I checked the Walmart in Thomasville, AL and I don't think they had any, but that would have been a year ago. Wander around on the bike looking for them.. That's how I found out they don't have any around me.
If nothing else, it's fun to look.