I have been having a hard time finding AL single conductors. Everyone has the bundled AL service wire, but I have been looking for some single 4/0 AL for a job. Exactly 3 - 4/0 and 1 - #4. Only thing I can find is 4/0 4/0 2/0 #4 bundled together. I am installing a 200 amp sub panel.
Anyone else having this issue? I know most of you guys use bigger AL wire, so you must have a supplier?

Thanks John

I'd order XHHW-2 4/0 in AL and be done with it.

Tesla, Done. Yesterday....Thanks for the reply.