Can't say for sure about Pentax 67 screen, but Mamiya screens work. You should check the thickness and appearance first.
However, my (cost-effective) suggestion is to try one of the Chinese/Hong Kong sellers on ebay for fresnel screens. I recently got a Rolleicord with apallingly dim original screen, and got this as a replacement: item #360435797684
Had to trim it a bit: it's plastic, so a belt sander (or even plain coarse sanding paper) works well.
I'm more than happy - by my estimate, the screen feels 2 f-stops brighter. Screen has fresnel, split screen and microprism "ring" around the split circle....
Not quite the original (I have one for my Rolleiflex T, in which fresnel grooves are a bit smaller/finer), but then again, neither is the price
If you are looking for something economical (not to say "cheap"
), I can heartily recommend this one. I paid all of $21 for it - including shipping to Europe.
I guess it's similar to what Rick Oleson sells...
I can provide a photo if you want...
Rgds,
Denis