It's actually a simple L Bracket with a single slot on the bottom and two slots on the front side for bolting it to the trans bracket.

Earlier 240 set-ups and 740's had an 'S' type wire bracket with two clamps and two bolts that mount the 'S' bracket to the header pipe, and another clamp that mounts to the trans bracket. Either type can be used, but the simple L bracket is the cheapest of the two.

Also I would get the bolts from the dealer unless you have a good source for Grade 10.8 metric bolts, washers & nuts (same as grade 12 SAE) as the cheap ones from places like Lowes/Home Depot don't hold up with the heat. I found some at an industrial supply store, but had to buy a box.