Regression model type II

Hi Benjamin,
Maybe this link is useful to you:
http://eeb37.biosci.arizona.edu/~brian/splus.html
It has a function 'slope' that calculates different type II regressions 
and a link to a paper comparing them.
Although it was written for S-plus it works in R too.
If you get any better solutions, let me know.
Best regards,
Angel

I am trying to fit regression models type II with R, but it seems to me 
that most (all) of the linear model functions are for type I regressions.

Does anyone knows whether type II regressions functions exist in R.

Benjamin