There is a ton of Victoria 3 stuff. Way more than Victoria 4 stuff, and way more freebies for Victoria 3 than Victoria 4.

If the Daz link doesn't work, type ps_pe036 into the store search and then click on "Accessories"
http://www.daz3d.com/i.x/shop/reqlist/-/?item=1098

And here is the link to the MP stuff.
http://www.renderosity.com/mod/bcs/index.php?TopID=11219.44031.

If the MP link doesn't work, click on "Market Place", and type in "Victoria" in the search.  Click "poser/Daz" and then select "Victoria 3" from the list of figures.

Poser Pros also has lots of stuff for V3. Click "Mil Females" then you can choose to browse for characters, clothing, textures or props.

http://poserpros.daz3d.com/store/

And there is a ton of V3 freebies too.  Just go to the Freestuff area, type in "Victoria" and  you will haev lots of freebies for Victoria.  You will have to look through them all to find the V3 ones though.  Hair and body poses and props can be used for all versions.  Characters need the right version.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi