AlfaMale,
SPICA pumps aren't very hard to come by, but (more importantly), they are very expensive.
That being said, there are several ways that you can go to get a replacement. If you visit
www.alfacentro.com, they have a bunch o parts vendors web-sites in their 'resources' section. Of those, International Auto Parts (IAP), Center-line, Linea Rossa, AR Ricambi all usually carry either re-manufatctured or new pumps. The IAP site lists a remanufacturec pump for $750. Another less expensive option might be to buy a used one or even a whole used parts car (usually much less than $750)...of course when you buy used, well...you just never know what you're getting!
That's all I've got to say on the matter...but there are lots of other guys on here with great advice.
Cheers,