Having an hour to kill before my local Saturday farmers market opens I was trolling ebay to look at all the pretty pictures and read the even prettier lies when I found this. A Wollensal Rapter 127mm LF lens. #7584133414
Knowing that many of my brother and sister ape-huggers shoot this format I thought I should post my find. $15.00 seems pretty cheap for a lens.
By the by, I have no connection with the sale.
I too have a 127mm Raptar. As Tim correctly points out, it just barely covers 4x5. I have come to love this little lens for people pictures though. It has a certain look that I find quite apealing. They sell cheap - I think I paid less than $40 for mine - shipped.
Here is an example...