Brown or Tan pickguard

closest thing i have now is an old Squier guard that has either aged or was dyed but its more yellow
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What color is your jazz bass?

I have a shoreline gold p bass that I think would look great with a brown pickguard of some sort (not plain brown). But, unfortunately just as you said brown tort has too much of a reddish hue to it. And brown pearl has too much of a bright amber colored look to it.
 
Depending on where you live, a plastic supply business would have most any colour (in sheet form in the appropriate thickness) you would want. In SF we have Tap Plastic and a pg sized piece would be pretty cheap. These would be single colours - not laminates.