US Caller ID Module

[EdwardATeller <sorry_no_email@xxxxxxxxx>]

Looking for an inexpensive Caller ID module, under $20 if possible.  I
have a great wired phone with a headset I like, but it doesn't have
caller ID.  Simplest thing is to get a separate module.  If anyone
knows of one, I'd love to hear about it.  Using Google turned up
something in Canada:

http://www.thesourcecc.com/estore/category.aspx?language=en-CA&catalog=Online&category=Caller+Id+Modules&pagenum=1&sort=1

but I am not sure Caller ID works the same in Canada as the US, where
I am.

I just returned a two-line ATT 992 phone to Staples whose headset
sound quality was not as good as my $10 Wal*Mart phone.  It was the
cheapest wired phone I could find that had a headset jack and Caller
ID.