I believe I was looking for the same poem 6 years later :) This is what I found:

To be recited in Cowboy drawl
Personal column AD
It was kind of cute
And sort of solemn
This is an Ad I saw in
The personal column

Wife wanted it said, right off the bat
Now you can't get more plain than that
IT SAID
Are you looking for romance
Someone to squeeze you when you slow dance
A man to _______ ____ warm those icy toes
For the wrong Ad you have just durned chose

But, for a wife I have been looking
Share some of the work, do some of the cooking
There ain't no wages, there's no retirement
And there's really only one requirement
A good tractor she must own
With a zero balance on the loan
I'm ageing fast so times a factor
Please send photo of the Tractor