i've looked all over on-line, but the only places i have found are: http://www.carsoption.com/buy/product_info.php/cPath/1_9_53_152_159/products_id/414
i typically would go right ahead and place the order, but first there is no way to contact them unless by e-mail. i have no idea who these guys are or where their place of business is located. my number one rule about shopping on-line: if they don't have a phone number to contact them, there more than likely shady business people who are selling stuff on other peoples time.
anyways, if your looking for just brighter bulbs polarg does make a hyper red bulb which runs ~$9 bucks and should be easy to find.
the main difference between the hyper and the visual, is that the visual has multi-chromatic surface coating which turns the bulb gray/chrome when not in use. this is something i want because the turn signal part of my taillights are clear.