Info not in archive or past posts. Where to buy brake parts by dimension?

I wish to purchase some brake pistons.
I know the size.
Who has them cataloged by dimension?
All I can find is by application and no one has listed for mine.
The parts I'm looking for are 1 11/16" X 7/8" pistons.
I'm sure it's a common size if I could only find a size/application
or a size/part number cross reference.

Does anyone know?

Here's the deal.
I have a real pretty chrome torque bar and swing arm on my kz1000.
I couldn't find a caliper to fit.
Thanks to wireman I have a real pretty caliper with good pistons.
The pistons fit my old caliper but the 'new' caliper is too nice
not to use somewhere. So, I need to find a second set of pistons
and put it on the KZ1100 where it fits perfectly.

-Duck

Follow up to own post...

Found at cycle wearables in metric that are 'close enough' but
$40!

Visited auto parts store and the old guy(don't you love it when
there's an old guy who's been there for 40 years) says they used
to have the dimensions in the front of the parts book but they
quit doing it that way so they can charge more for a Porsche part
than the same part that fits a VW.

-Duck