Wireless Backporting

MAC80211 and Related Wireless drivers are always relying on the backports.
If we are supposed to use the mainline kernel, we may not need to use the backports.
For the vendors those who are maintaining the custom kernel (not upstreamed one) it difficult for them to generate the backports.

Is there any way to generate the backports from custom kernel or is there any way to get rid of the mac80211 backports.

Thanking you.