Ground Glass for 4x5 Toyo/Omega view camera......?

Dear Apug Members,

Was wondering where to get replacement ground glass for toyo g or omega e
As one is cracked badly, the other in our camera club is held together with packing tape...

The vertical lines and squares are nice, but would be happy with plain matte screen replacement....

A) any sources in the us?
B) approximate cost?
C) is there such a thing as bright screen for 4x5?
D) I am guessing that the glass is frosted on 1 side only and screen printed with grid lines...
E) is groundglass all the same size?

Thanks!

Harlequin....

A. https://www.bhphotovideo.com/ and Ebay are two U.S. sources for ground glass.
B. B&H $$$, ebay $ to $$.
C. Yes but are more expensive.
D. Ground glass are etched on one side only. The grid pattern can be on either side of the ground glass but usually on the non etched side.
E. Ground glass are not standardized for any format. Measure the ground glass for custom cut from ebay sellers.
The ground/etched/frosted side faces the lens. there may be shims between the ground glass and the mount frame of the back.
With the camera back removed insert a film holder with a sheet of scrap film in it. Remove the darkslide. Measure from the back edge that is the same height (some backs are uneven) on both sides to the film surface at several points across the film. Remove the film holder. Measure to the surface of the ground glass as you did withthe film holder. Shim the ground glass to match the film holder measurement. A rigid straight edge to lay across the back with a toothpick taped to it so the toothpick just touches the film surface is sufficient for the measurement..