Maybe the fronts from a 6 cyl BMW? Like a late 80's 325i (I have a spare set, but I am in CA). They can handle the heavy motor, so might work for batteries. Also I think they are fairly tall.
I don't remember if you have a spring compressor, I got one from harbor freight for $10-$15, but I think Kragen or Autozone will rent them for free. They charge you as though you bought it, then refund you when you bring it back.
You can also go to Kragen and get a rubber doughnut that you can work into the springs. They are around $10 apiece and you find them near the lift kits and leaf spring blocks for trucks. They look like this:
Rubber Coil Spring Spacer - Speedway Motors, America's Oldest Speed Shop
I needed them in the rear of my 95 and 96 Jettas, without them it would just about scrape on the ground when loaded.