You probably have a Lisa 2/10, but lacking a hard drive is a death blow since you can't do very much with a Lisa without one. There is a replacement for these here: http://www.sigmasevensystems.com/xprofile but they are expensive. You can buy them here: http://vintagemicros.com/catalog/product_info.php/cPath/30/products_id/99
It all also depends on what you want to do with it.
If you only want to use MacWorks on it, the SCSI card will work fine, and there are CPU upgrades, and floppy drive upgrades for it. If you go this route, you'll lessen its value as it won't be able to run Lisa Office System.
The floppy drive from the original Mac, sometimes you can find external versions of these, will work with the Lisa as they're 400K drives. You'll have to remove it from the case and install it internally.
So another thing, does your Lisa have the drive cage even? It sounds like someone stripped it... hopefully you do have the cage at least as they're hard to replace.
Head on over to http://lisafaq.sunder.net and browse those pages to learn more about the Lisa. It would help you to figure out exactly what you have in yours.
:b&w: