Here's one in PA that's 60 years old.
http://www.patriciapleases.com/

I have also done this one:

http://www.hellscafe.com/jackie/

She is at least 70.

I'm looking for someone really old, not middle aged.

Thanks though - good try - Pat is a goodie.

Try Shirley in Los Angeles. Has to be (MINIMUM) in her mid-70s or older. No pics of her on her ad. She did do some magaine work as a model. The magazine was 50+ Magazine. Her hair, on her head and pussy, is dyed jet black. She will provide full service for added money. You bring the covers. She will give a BBBJ and will offer CIM for a little extra encouragement.

Not someone I would like to make a habit of seeing but she fits the bill of being old. I am using an alias because I am not particular interested in having folks know I have done Shirley. I did not review her for the same reason. But one guy did...

Also goes by Stacy.

And stay respectable here.  Its a great place to show respectability.

If you want a truly awesome older lady, I think she says she's 58, try the wonderful woman, Anneke.

She is a class act, and also has worked as a porn star, so she really knows what she is doing. Let her reviews make the case.

reviews link is http://www.theeroticreview.com/reviews/show.asp?id=29628

http://www.annekepleasures.com/

...I've been there.  I'm looking for some lesser known vintage ladies.

She lives a little north of Tampa in a nudist community. Gives a great tantra massage and is in her mid-70s. Very tanned, very responsive although no FS on the first visit. I also read somewhere that she can be very dominant if you are into that and enjoys using her strap on ....

There was a lady in the L.A. area who some said was possibly as old as 60.  She was naturally very busty and in very good shape, and apparently her French skills were incredible.  As I recall, most reviewers rated her a 10 on looks for her age and an 8 for any age. Her performance ratings were in the 8 - 10 range. She may have retired as I seem to recall she was looking for someone to settle down with.  In any event, I can't remember her name, but some of the folks from L.A. and the vicinity may be able to and give us all a status update.

Mary Jane is in her 70s and still a really great lay (including outstanding greek).  She's even still attractive.  I did an overnight with her once and it was just non-stop fucking.  You can find her on Vegas Exotics.