Yeah WIM can fit ARBs along with most other parts (fitted rear shocks, exhaust and arbs for me) along with being tyre/wheel & geo guru's. WIM are c£65ph. My front droplinks needed replacing c70k miles but the rears were fine. Droplinks are expensive though at about £35 a corner from lexus and i couldn't see OEM quality parts any cheaper.
Those cusco bars use the original fittings and am not sure why they are pictured with bushes as IIRC they don't come with them.
A word of warning on those though is that I think they will change the handling characteristics of the car as they stiffen the front up way more than the rear. I think this will make the car understeer more, wheras the C-One's retain the roughly the same handling as OEM just stiffer. I expect i've got something worng, someone will let me know......:)