With 90,000 miles you don't have much of a hope of getting the clutch changed as a freebie.
Depending on driving conditions and drivers habits, clutches can last anywhere from 60,000 to 200,000 miles on Subaru's. Sometimes they fail a lot earlier, and sometimes they last a lot longer. I had 366,000km (228,000miles) on my 93 Legacy's original clutch when I hit a deer and totalled the car.
Is your clutch judder a new problem, or has it been there from day one?
Clutch judder is often caused by:
1. worn clutch disc surface
2. broken or weak springs on clutch disc
3. warped flywheel surface
4. worn clutch cover (pressure plate)
5. throwout bearing worn out or disconnected from release lever
In the case of Subaru's the clutch disc material causes judder when cold.
At best you might get Subaru to split the bill, but I doubt it. A TSB generally means that problems will be fixed during the warranty period, unlike a recall which applies to all vehicles regardless of warranty coverage.
My 2001 Outback had the clutch changed due to judder at 54,000 km (~34,000 miles). It was changed under the second TSB (revised replacment parts) at no cost to me.
Now my clutch judder has returned after only 3,000km on the new clutch. The new judder problem is less frequent, but far more severe than the old problem.
I am trying to convince Subaru Canada to swap the clutch assembly again and this time replace the flywheel, rather than just resurface it. I have a hunch that the flywheel was not resurfaced properly.
Some links on this issue:
http://www.sidc.co.uk/faq.htm#3.5
http://forums.nasioc.com/forums/showthread/t-381888.html
http://townhall-talk.edmunds.com/WebX?14@214.OqIAbohfbKz.1@.ee9e76b/1294