Been looking for Wisner 4x5 bag bellows for a while, but they are scarce. Is there a company that can make one at a reasonable price or a "brand X" out there? Can another brand fit on the Wisner? TIA.
I don't have a source for this, but I do have the bellows. But there is a workaround if you don't have this.
You can mount your wide lens on the camera and retract it to get it as close to the film plane as you can just by adjusting the focusing rails of the camera. Then you tilt the front standard
back and rotate the lensboard so it remains parallel with the plane of the film.
I do this all the time with a 72mm Super Angulon XL because I hate taking the time to swap bellows back and forth.
If you plan to shoot a lot with a wide lens, the bag bellows is a better solution.
I'd keep an eye on eBay and the Large Format Photography Forum website.