Get term id argument from ubercart catalog

Question

Hi Trying to figure out how to get taxonomy term id from ubercart catalog page. It looks like ubercart catalog system does not support "native" drupal structure "taxonomy/term/id"

I've used this snippet as argument for block provided by Views module

if (arg(0) == 'taxonomy' && is_numeric(arg(2))){
  return arg(2);
} else {
  return FALSE;
}

but it does not work anymore.

Thanks for advice.