Find a new supplier. There are plenty of places to get #1 battery cable for under $2/ft. Welding cable will come in at $3/ft or less.
I bought 2/0 battery cable for under $3/ft
When writing the response I just did a quick price check off the internet to get an idea. Doug
Waytek and del city have pretty good pricing on cable. Del City is really nice if you buy $100, get free shipping with a 20% off coupon. Stuff gets heavy.