I'm sure it is someplace on the forum, but I couldn't find it. For those who use aluminum plates either for heat dissipation or compression, where did you buy it?
Yeah I did look at those. There's two issues for me. First, his plates are sized for the 280Ah cells that 90% of the people here are using. I'm using the slightly smaller 230Ah cells in an 8s configuration of 2 rows of 4. Doesn't look like @Lt.Dan's stuff will fit. Secondly, my system is a stationary install in the basement of a cabin. I'm not convinced my cells need compression, and I'm not sure I even need something to stabilize them. So my main desire is for a plate under the pack to dissipate heat from heating pads underneath.
I am considering some sort of fixture just to allow me to lift out the whole pack from the battery box, so I'll look again at @Lt.Dan's plates.
I've made several metal purchases from onlinemetals.com all with good experience including lots of custom cut sizes. And they're very responsive to emails if you have a question about something you wish to order. Though their shipping prices can sometimes be higher than desired so be sure to order all of your metal needs in one order.