Gamesworkshop, or other minature bases, could be used, to glue the minis to in an upright position, or poker chips or whatever:
take a base and a card token, plus glue, some dowelling or matchsticks, maybe something to stiffen the token for support (like clear plastic)
ideally the card should be stiff, but you could glue some clear plastic to the token, for an upright support to add stiffness.
for example, maybe a margarine tub lid that's clear plastic, cut a bit out of it, and glue ot the token.
A simple strip or square of clear plastic is ok, you don't need to match the token's shape. You just want clear plastic for support as cardboard or card token will get damaged too easily.
To fix the token to the base, you want some support, hence matchstick or dowelling.
White glue is ideal, you can also use Epoxy if wish for more strength/faster drying.
having two matchsticks or larger items glued along the bottom of the token, adds support, then glue it to the base.
an "L" shape piece of plastic or the like is even better support on bottom of the token.
I used to buy specific plastic strips, like girders ("I" or "H" beams) from a model shop, normally used ot make model bridges etc, great for supports on many other things.
I made a Lord of the Rings chess set, with such plastic used to build Minis Tirith, Helms Deep, BaraDur and Isengard, and the old, great Mithril minis for other pieces
