I lost two right screws when I dropped my unit. Did not notice it till much later when the bottom part started to get loose.
I called PalmOne Hotline (based in Singapore) and they did not have those parts in stock. My unit is outside the warranty period and, funny, they offered to replace my unit at $125 charge. But I said I'll wait. They promised to send me the parts free in January, or as soon as it becomes available.
But you know what? I went to the store where I bought my unit and they gave me the screws on their dummy T3 display unit (exact parts) and my problem was solved.
Do you see any dummy display units in any store?. I'm sure they will not mind giving you the screws.
Regards.