nelson daf chair base - need your help  

hi,
i'm searching the web for several times to find out something about the construction of a daf chair. i couldn't find any informations about if and how a la fonda base fits under a daf chair. i only find your forum... i hope someone of you can help me. sometimes you find daf's here, in germany or europe, with lafonda bases, they are affordable. okay not really, but more than one with swag legs. these are about 3000$ minimum. i guess they were produced for the european market only. what i whant to know, is it possible to remove the eames base and put a swag leg base under it? if never seen a swag leg chair for real, so i never had the possibility to look under it... another question, if you have a upholstered version, do the screws looking through the shell on the top? like on upholstered eames armchairs. and my third question is, is it possible to buy herman miller swag leg bases solo in the states? or do you have to buy a whole new plastik daf chair, if you only wnat the base? does everybody know a mailorder, which is selling herman miller stuff outside the states? i know, there are restrictions, but... not only that vitra products are much more expensive, they don't produce the swag leg chairs. but the swag leg desks. by the way that doesn't make sense to me...