ok. here's one photo (yes it's bad) but we used some flat aluminum stock, bent and made brackets to hold the two-gallon enclosure utilizing homemade vibration absorbing mounts. they were made from jetta radiator mounts and some nut-serts. then we tapped the existing holes in the enclosure for the bolts we would be using. then we milled small vertical sections so the tank can easily be removed and installed by loosening or tightening the bolt into the homemade mounts. the brackets mount securely to the body of the car and provide the stability needed. simple, very effective i think, and will keep the fluid from sloshing or moving much at all due to the damping.
this is the radiator support p/n for the bushing we used:
i'll post more as we finish installation!