Quick question on how warrantees work.

Hi all:
I have a quick question about how warrantees that is probably so obvious, most people don't bother mentioning it. Hence, I haven't figured out after reading other related posts on this site.

Can I get an extended warrantee of some sort if a previous warrantee on my car has expired for any period of time?

I assume from comments like "I'm at 33K miles and need to decide quick" that warrantee coverage has to be continuous; but I want to make sure.

My specifics: I bought a 75K miles extended warrantee from the dealer with my 2005 Gen2 Prius that I bought new in 05. In hindsight this may not have been as good an investment as I thought, but oh well. I used the warrantee when replacing a leaky coolant pump, but that's it.

Fast forward to today: I'm at 72K miles, 3K short of expiration. I'm driving less these days, so can probably stretch that a fair amount. But I'm curious: does this mean if I go past 75K, I lose the option to buy a warrantee up to 100K or 125K at a later date?

That's my simple question. If once you're warmed up with that, you want to throw in any additional advice on the *value* of such a warrantee - specifically for the mileage between 75K and 125K or so - feel free This is my first vehicle, and I'm not sure what I should expect the "end game" of my Prius to be - whether I'm buying a new one at 125K, limping til 175K but with mounting repair bills, or what.

Thanks!