My bicycle is pictured below; you may notice that the front tire is wider than stock, and I'm intending on replacing the rear similarly whenever it needs to go. The challenge is, I want fenders so I don't have to worry about getting caught in the rain, but there is not enough room between the fork and the front tire. Do I need to find a creative sheet-metal fabricator, or is there an off-the-shelf option of some sort?
You could do this with off-the-shelf reacharound brackets. You can also make them out of leftover rack upper stays or other flat strip metal stock.
The idea with them is you take a fender set and cut them where the fork crown and seatstay bridge are, so the fenders don't have to go under them or the brakes. Then you drill holes in the cut off pieces and bolt the brackets on.