Venom I have a list of alternative inserts at work I will post tomorrow. I doubt they removed the restrictor. Interested in any more info you can get regarding it.
However I think once you get to that point may as well get some HotBits as jf1sf5 has done. jf1sf5 the RS1 hotbits have the remote canister, but so you could avoid that problem with fouling on the swaybar. Imagine they are more expensive though?