[keefer]

no you would need a larger bottom yoke.
and the spindle fitment is different on the Aprilla
I have a set of Ducati forks with yoke available.
On flea bay at the mo.
with regard to callipers, Radial yes but you can only use the funny Ducati specific Items.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ih=013&item=230025198545&rd =1&sspagename=STRK%3AMESE%3AIT&rd=1