send an e-mail to import-jdm.com, it's my mechanic and he sell my asr original for 190€, around 140£, talk with him and see if he can send it to you.....mine took a few weeks to arrive but it get here safely and is original, you can see pics for yourself on the topic of my del sol, I was looking for a stealthy black one but since it'll take a month to be on stock I choose a blue one that was ready for shipping.......
about the fitment issue I always heard that you don't need a asr subframe for the ek9 and dc2 type r since both of their subframes came reinforced from the factory to allow the use of a 21\23mm sway bar, but if you really want them make a call to asr and ask them if they fit or not.......