Well HK has discontinued the full size USP's in stainless steel.
This was due to poor sales of the stainless models.
I have several 45's and would like another 40 so this is my idea.
I'm not the first one to think of this but it has also crossed my mind.
Get the full size with the HE finish (only choice at this point) and have the slide refinished with Robar's NP3
Here is one from HKPro that was done in NP3: