looks like there is a Bridgestone slick still available for those stubborn enough to want the standard rim in. Am fitting it shortly so will post a pic for anyone interested

http://mc.bridgestone.co.jp/en/products/racingbattlax/index.html

SP250 / SP400 (N250) CLASS

150/635R18 ME77 RMR04325
4.50 4.00-4.75 631 149 180-210