What's wrong with yours? They look pretty good compared to some I've seen. (BTW: your car is a dead ringer for my old '77 black/beige

)
If it's just dirty, you can pull them and scrub them down with a soft brush and soapy water. The vinyl cleans up pretty easily.
If you find a set in black though, let me know!

__________________
___________
Jeff B.
'75 Alfetta Sedan (
rosso)
'69 Lancia Fulvia Rallye 1,3 S (
rosso)
'92 Ducati 900SS
giallo
gone but not forgotten
'79 Alfetta Sprint Veloce(
luci del bosco)
'77 Alfetta Sedan (
nero)
'76 Alfetta Sedan (
argento metallizzato)
'86 VW Scirocco 8v
'72 Honda CB500/4
Pics!
http://www.flickr.com/photos/13463758@N04/?saved=1
North American Alfetta Sedan Registry (work in progress

):
http://alfanaticsf.googlepages.com/