Here are several choices:
As you already pointed out, LSC member Richard Kapuaala sculpts, produces and sells a line of really great figures in several scales including 1:20. Richard’s sculpting focus includes historical personages. See:
http://www.kahunanui.com/orderform?catalogue
Railroad Avenue has a number of really nice painted 1:20 figures. Some such as “Flo,” a woman with a toddler, a baby in arms, and another child ‘on the way,’ are really unique. Same with the reclining “Jethro.” Together they could make an interesting scene!! See:
http://railroadavenue.com/g-scale-figures/
My most recent purchase is a 1:20 scale unpainted female ‘engineer’ from a Chinese supplier advertising on Ebay. They have a line of highly detailed, accurate to scale figures, but mostly modern and / or military. The Asian ideal of American women is very apparent! Both delivery and quality were excellent. See:
http://www.ebay.com/itm/Resin-Kit-1-20-Ma-K-SF3D-Figure-Female-Engineer-/220911647929#ht_1995wt_913
Do an internet search for “Fine Folk.” AFAIK they are no longer produced, but occasionally show up. Really detailed line of resin figures in interesting prototypical poses.
Happy (Well Populated) RRing,
Jerry