Picture looks just like the ECI one, for $10 more than ECI. These brackets used to be $69.95 everywhere I looked. Mine came last night via UPS from ECI. What I like about it is that it is bent with a sheetmetal brake and then welded using only one piece of metal, if I had to make it myself, I would have a lot more welds.
Would love some pics of your 37 setup as I brought a 39 home last night and am thinking a dual master for it, too since I have to check all the wheel cylinders.
Olivertwisto, if you want a picture of this thing so you can get your creative juices flowing let me know. I can probably take a pic with it in the 53, too since theengine and tranny are out right now.
Chris