Custom air filters

Hello to the good people of KZR (and gidday to the bad ones too).
Some time ago I recall seeing a thread about a custom build (either Z1000 or maybe Z1300) and the builder had sourced a custom foam air filter that connected to all four carburettors. I am fairly sure it was an English firm that built the filter.
Can anyone remember the name of the company or the build project?

I have a Z100R that has been fitted with two K and N filters across the four carbs but unfortunately the spacing of the holes is just a shade narrow making fitment a little hit and miss.
I know single pods are the norm (and may have to be the solution) but if possible I would like to fit a single filter utilising a common plenum.

I do have the stock air box that could be refitted but not without modification which I would like to avoid.

Any help would be much appreciated.

Cheers.... Darryl

Abe breadbox

Thank you Peter1958 but not quite what I was after.
I should have said that my bike has RS34's nit the stock carbs.

Put finger to google after posting and have found Uni filter Quad pods which look like what I am after.
But they are Australian not English as I recalled.