Alternative to silicone cable WI-M-10-25-5

Hello,

I am looking for 10 AWG silicone cable with green insulation. Must be rated to at least 150 °C and have approximately 1050 strands (the usual cables will have about 100 strands, which is not enough for flexibility needs).
I found the WI-M-10-25-5, but Mueller Electric cannot provide the needed documentation for it so I’m looking for a different supplier.

Preferably on a 50 - 100-foot spool.

Thanks for your help.