Hello,
not sure if this will work, but i have made some micro banners 88x31 on http://myfunclicks.com/ . now i will be honest with you and say i have no idea why other arcade banner exchanges do not have these types of banners, but they are page saving and don't take up much space at all. so i am Beta testing them to see if they will work or not. problem is i could really use some users to signup and try them out. if nothing else all it will cost you is 88x31 pxs of your website. which i believe anyone can afford that much space on their website or sites. well thats about it for now. thanks for your time and for reading this.