Adding to a v old topic I know, but just for information....
if you have a friendly mechanic/engineer who is willing to dismantle your dizzy to change the bearing (takes a couple of hours - I watched it being done this afternoon) then the bearings are available from a company called Henderson Bearings who are based in Crow Arch Industrial Estate in Ringwood.
The bearing itself is a non standard size so be careful if getting from anywhere else (the hole in the middle is 12.5mm instead of the standard 12mm), but Hendersons just happen to make them on site for somebody (probably someone who recons del sol dizzys!) and were able to supply one there and then. Think it cost the grand sum of £12 but not sure if there were discounts involved in the price cos my friendly mechanic bought it not me
Anyway.......... hope this helps someone out
Mist xxx
Edited to add that my del sol is a Vxi 1.5 auto