Busted Rear Upper Shock Mount

[StLBroncoII]

I am a newbie here and looking for some help with a little problem I got with my stock 86 B2 2.9L 5spd 4x4. I must have busted my rear upper shock mount (I think rust helped it) and cannot locate another one. I have searched everywhere on the net and went up to my local Ford dealer with no luck. My B2 has been delegated to off-road duty only and performs great. It just feels like on the big bumps that my head is going to go through the roof if I don't get this fixed. Are all these brackets gonna be rusted out at the boneyard? Any suggestions or advice from anybody who's had some experience with this would be appreciated.