I have used both BrakeSmart and MaxBrake and both are excellent. I will never use anything else. When you have used one of these systems with large heavy trailers, you see and feel why ! They are worth the money and worth spending a little time making modifications. SmartBrake is used by lots of OEM shops customizing 5th wheel haulers (works with air/hydraulic/electric brakes) . It integrates into the dash very nicely. I use SmartBrake as a personal choice (I do not like the protruding sliding lever on MaxBrake). In the past made a several custom parts for it to have trailer brake override on the shift lever (so you can apply trailer brakes without apply vehicle brakes). Yes MaxBrake should update their design and so should SmartBrake, however that has never stopped me from purchasing any product, studying it before installation and making major or minor changes to it during installation.
Sorry, no numbers on the fitting. The hydraulic block can be purchased via McMaster's (best source for it), you will have to measure the treads on the sensor, the master cylinder (male/female ends) are standard size. Most major old fashion auto parts store will also have it. I am very sorry I can provide a part number, my old email system crashed and lost all the orders for all the various parts. SmartBrake uses that block, however when friends wanted MaxBrake installed, I used McMaster to get a replacement part and do their installation exactly the same as a SmartBrake install.
Hope that helps.
Cheers