An old friend of mine was JA’s agent back in the day. She is now ill, and I wanted to draw his attention to the fact in the event he might want to contact her.
Any ideas?
If you sign up for a free trial membership of IMDB Pro, it looks like you may be able to get contact info: Link. He currently has a show on CBS, so you may be able to contact him through them or the production company, but I’m not sure anyone very high up would read that letter or email.
Maybe try his production company:
Angelark Productions
Telephone and fax
Tel: 818 508 3338
Fax: 818 508 2009
Address
12711 Ventura Blvd
Ste 330
Studio City, California 91604
USA
You mean Jason Alexander of George Costanza fame, and not Jason Alexander of “I married Britney for a day” fame, right?
First you chew on a pencil, put it in your glove compartment, and sell the car to him. Next, you bite him. He’ll find you after that. 
Good luck! I hope your friend pulls through.
Make sure you tell him you’re Jon Voight.
You’re a bunch of Anti-Dentites!
Tell him you are the Bubble Boy.
Tell him you found the cure for shrinkage.
Paging Art Vandelay, Architect
Maybe Marisa Tomei knows.
Thank you, I will contact his production company.
I want to make it clear, I have never met the guy. Sorry if I gave you that impression.
Also, I apologize for my long time in replying. My ISP spent the day quietly floating face down in the pool.
Are you sending him a Festivus card?
Now now, I’m sure Jason Alexander is tired of all the George Costanza jokes his fans make when they meet him.
So, instead, I suggest you make a Mauricio Wilson joke. Ask if you can see his tail. Tell him you think it’s like a cute little puppy dog.
Well, in the interview in the TV Guide issue featuring the Seinfeld cast, he says he gets more fan mail since the show went into syndication than when it was on the air, because he’s in the phone book. Doesn’t he live in New York? Or maybe Los Angeles.
No, no. Tell him you’re John Voight. 