Lens mounting blues

Just bought a new board 110mm2 for my copal 1 Nikkor-W 210/5.6 lens for my 4x5.
I mounted the lens on the new board, but alas the aperture ring does not move now.
I understand I need a spacer, but when I bought the lens new in a Nikon Linhof-sized board, and subsequently took it apart, I did not notice a spacer ring.
So, if I'm not mistaken, I've been informed that I need a spacer ring for this particular lens, is this correct?
Where o' where can I get one at lightening speed?

I needed a spacer quick, I used black gasket paper, thin and clean. Just cut with scissors.

Black poster board will work too.


Kent in SD

A THOUSAND THANK YOUs. I used a piece of thick card stock and it works