Great shots! Those pieces really don't look like they'd do all that much, but perhaps it is "just enuf"....
OK, played dig in the Spicer website (www.dana.com) to try and find out info on the cork seals and the half shafts in general. Actually they are "drive shafts" just short...
Cork seal has a number: #3-16-53
Shaft pieces have numbers too!
Slip Yoke assy:3-3-118KX
Dust cap and washer (and cork) kit: #D3A
Yoke assy: 3-82-268X
These numbers do not include the parts that bolt to the hub axles, or the ZF.
U-joints remain to be found yet!
Will update this when I find a dealer that will sell small parts in case you find one that is wanged out of shape, or need cork seals too!
3-19-09 UPDATE. OK, it appears that Dana Spicer is the only remaining portion of this perhaps otherwise British company, here in the US, and has entered bankruptcy! The company that bought them up, is not selling much of the products and it was uncertain how much will be available in the future according to the person I spoke with at a local driveline shop!
Bad news....good news..... the cork seal listed above is not commonly available here or in Australia, the only other continent that seemed to be offering Hardy Spicer/Dana parts.... What IS available is called a "Dust Cap Assembly" #D3A and IS available locally. Check a DANA Spicer driveline shop near you! What the #D3A "cap assy" consists of, is a new threaded cap, the metal washer, AND the cork seal! Aprox $12-14 each. I ordered a pair from a biz by the name of Driveline Service in Pittsburgh, CA. We'll see how they come out!
On other good news bad news....my bearings that I ordered for the jackshaft are in....but it would appear that an opportunistic employee of the bearing company "may" have hijacked my credit card number and a few others.... authorities are now investigating..... made for a crazy few days of phone calls and no credit card with which to buy more parts!
(Credit card co. actually flagged the bogus transactions and shut my card down almost immediately! 
)Steve