I actually made the DIY riser a couple years ago but didn't use it since I found I had enough clearance on my K&M adjustable bar if I flipped one of the sides to be on the opposite side of the center and then added a 5/8>3/8 + 3/8>5/8 pairing of adapters. It is a 3/8' coupling nut with a 3/8" bolt I shortened (by hacksaw and file) and epoxied to the coupling nut. The delrin mic bar will be a simpler setup for me and I'll probably use it 95% of the time.
ETA: I found I can get the same 1" if I use two sets of 5/8>3/8 + 3/8>5/8 pairing of adapters, but I figured since I had the DIY one in my bag all this time, I should use it.