(also posted at LFForum for my friends there.)
The smaller Wollensak Velostigmat Series II lenses are ubiquitous and cheap.
Earlier today I carefully modified a 7 1/2" Series II, and at sundown I banged out a set of images to see the results. They are here. Take a look if you're interested.
The Series II was in an Alphax 3 shutter so that makes it easy to use on 4X5. I installed a spacer behind the front most glass, but not so much that the crown sticks out beyond the barrel, and I also added space where the rear glass in the front group goes in. About 2mm total I think. Everything fit in the shutter as before without any clearance issues.