I assume Hobby Boss is doing a P-61 in 1/32 because they already have one in 1/48. So they have most of the data, just need to rearrange and cut molds in a larger scale.
The 1/48 th kit has gotten pretty good reviews, although the cowl openings are too small in diameter. Hopefully they will fix this detail, and add a few more for our scale, when/if they do cut molds.
I woukd feel better though if I saw a review from someone like Derek who is vry familiar with the Widow...