With the B-up / M-ups for elites / plats, please make a way to split up a connecting flight that begins in a spoke on one of the regional partners (express, colgan, etc.)

Living in a spoke, there are no B fares between my home airport and my hub. It goes from the standard fares straight to full fare Y.

I've had numerous times the past weeks when I'd have gladly paid extra to bring the second leg from my hub to my final destination to a B fare and secure my upgrade in advance. I can't, though, because these fares don't exist for the first leg of my trip to my hub.

Many thanks.