I'm playing around with Inkscape as well (mostly 'cause I'm curious), and the SVG's generated by the site are embedded, so they cannot be transformed directly by Inkscape. So, what I did:
1) Create the label so that it is 24mm in diameter, centered on the page. One file per denomination.
2) Create a "root" level below the label. Lock all levels except for the "root" level.
3) Generate an SVG for each chip from the site.
4) Open in Inkscape and Export as PNG.
5) Open the label file, and select the "root" level.
6) Drag/drop the exported png image into the root level.
7) Use the align tool to centre the png image on the page. It should be centred underneath the label.
I exported each chip and created a new svg with each finished chip image. I went with a 2-spot chip (B2), using a colour combination which is also distinguishable as monochrome (as I have colour-challenged players). It ended up as
View attachment 490243
After working out the cost to have them made and shipped to Canada, I doubt I will participate. Still, it gave me an excuse to figure out curved text and some of the features of Inkscape. And yeah, I have a great respect for the true chip artists here. I have neither the skill nor the patience to do this.