Pentax 645 120mm macro f/2.8 or f/4?

Hello
I recently have read a review about a Pentax 645 120mm f/2.8 macro lens.
If you google this item you only can find a 120mm macro lens with f/4.
Has Pentax ever made a 120mm 645 f/2.8 macro lens?
Thanks

Could they have been talking about the 150mm F2.8?

http://www.pentaxforums.com/lensreviews/SMC-Pentax-FA-645-150mm-F2.8-Lens.html