hi, yeah i got my droplinks from ICP. I also got new bushes from them too. Like you i did want poly bushes, but it looks like a right chew trying to find the right sizes n what not, so just went for OEM ones. Wont last as long, but they are cheap so its okay. .
Are the sway bar bushes the D bushes? I got some from ICP, maybe you could have a look on ICP for the D bushes for your car as it will tell you the correct size?
I'm afraid i have little to no idea about the parts being interchangeable, i just tend to buy from ICP as you can check if it definitely fits.
Edit
have you checked Scooyworld? http://scoobyworld.co.uk/catalog/index.php?cPath=39_274_325_364&osCsid=lt5ddecisu4vdhbhae3jle2ee2