Tom,
Are you handy at all with a table saw ?
There is one member, John Long that has a great solution
for a holder for painting a figure.
I will try to see if he might have posted here to on how he made
them and what they look like.
Basically it is 2 little blocks of wood. There is a thrumb screw,
that is what I call it in the center that goes through both pieces
of wood and you just un-screw it, put the peg / post that is in
the figure's foot in.. then screw it back in tight.
My husband has made many of these and they are great.
I will see if I can find a picture to give you an idea.
What I use to use before are square blocks of wood.. drill a hole
as large as the pin or post and then just set it in and sometimes I
would have to use blue tack to help hold it.
Dee