Heat Shrink for 6"x5"x11" battery pack?

[Fusion80]

I'm trying to source a large heat shrink tube/sleeve for my Lifepo4 battery pack. I need to replace the BMS but I'll have to cut the heatshrink the manufacturer installed.

Anyone have any ideas?

Thanks,

 

[aroundqube]

https://lunacycle.com/shrink-wrap-tube-black-rubber-like-ebike-battery-pack-per-foot/