If you want to start with ready made sections. The churchill replacement sections from William Woodwrite, over in Guelph, uses a standard 10x1.0 mm thread.
William Wood-Write Ltd.
I have one of these sitting in the shop, so i did a quick check for you.
I drilled a piece of acrylic with a T sized drill bit. Then I tapped it using an 10x1.0 tap from my generic Canadian Tire bit set. I then had to drill a little recess to fully seat the section, using an X drill bit.
As you can see in the attached pics, it worked well.
Hope this helps get you started.