You can still get OEM filters from the Honda dealer or from
http://www.westernhillshonda.com or
http://www.cmsnl.com. I would recommend them over the after-market alternatives. The UNI filter expects you to zip tie the foam directly to the gold metal plate in the air box. Air tight? Maybe. The TwinAir filter comes with an air boot already attached and mounts directly to the carb. However then it flops around as the air boot is smaller than the hole in the front of the air box. IMHO, inferior designs, superior filter. Anyone had the same experiences?