new springs and sliders will make it feel new again.
dunno why they say they are no longer available, i have 2 kits in the shed, 1 to fit 1 for spare and i got them last year, i even got a kit for my xr2 (1985 model) so you should still be able to get them for the mk3.
but i have found some dealers say they cant get the bits but others can, might be the fact the dearler cant be arsed?? if you get stuck getting some, there are kits on ebay but there a little more expensive than ford

http://cgi.ebay.co.uk/Ford-Fiesta-Es...item439b24ecac