Ah that sucks, I personally went from ritalin to medikinet because of availability and I didn't notice big difference, LP for both. Maybe that's an option for you? (like really same effect at same dosage, maybe a little less longer but like concerta was tottaly different in comparison)
I'm an Elvanse (Vyvanse for Americans) user, unfortunately. I don't tolerate Methylphenidate well (they made me try like four different versions of it first before they'd give me the Elvanse) and as far as I know there is a shortage on just about all Dexamphetamine based medications.
I spent 2 hellish years without meds because I lost my family doctor. Keep strong and ask a friend to remind you forcefully weekly to check your bills. Good luck.