I replaced our original 12 volt house batteries with 2 Trojan T-105's a number of years ago. Turned out that the T-105's were a little bit wider than the 12 volts and I couldn't find a hold down that would fit. The golf cart place that I bought the T-105's from did have some thick plastic hold downs that they used. I had to make some minor modifications but they work fine.
In the picture below you can see the hold down between the two batteries has some notches cut to clear the attachment for the battery lifting strap. I did the same for the hold downs on the ends of the batteries and cut them narrower as well. I drilled new holes in the bottom of the battery box and used threaded rods. The batteries are held down solid.