Circa/Rollabind cover material, or A4 covers

I'm in the UK, and seeking recommendations for what material to use for Circa/Rollabind notebook covers, or for a source of pre-made A4 covers. I have a Rollabind desktop punch, and any material for home-made covers needs to be "punchable" with that.

So far I'm using the cardboard backings from some A4 refill pads, but I'm hoping for something stiffer and, hopefully, better-looking.

Advice gratefully received...

aef

Pendemonium, Clairfontaine page with Clairing notebooks

aef,
I have been trying on and off for more than a month now to join 43 Folders specifically to tell you what Tricia recently told you. (For some reasons I had some technical difficulties). However, I thought I could try and point you in the right direction by adding the specific link to the Pendemonium page for Clairfontaine, but that doesn't seem to work.

However, since it is a little difficult to find I'll try describing it. From the home page go to the left side of the page. Scroll down about 1/2 to 2/3 of the way down and click "Stationary". Then click "Clairfontaine" in the first box in the second column. Go 1/4th of the way down the page to the "Clairing" notebooks: CLA-C8135, 144 pages/72 sheets, Horizontal ruling, 210 x 297mm/8.25 x 11.75 inches.

HTH, ~Cath