Yeah, bummer kadet - that's exactly the same deal that happened to mastreb. He forgot to attach one of the baby stays and the mast tipped sideways and bent the mast base bracket and the bottom mast plate. (He blamed his wife and that put him in the doghouse for about a month I bet!

)
That sucks - we all bite our nails as the mast goes up. It always makes me nervous - my big fear is that the forward line to the bow cleat or the bow cleat itself will break and the line will snap back at me and rope whip me or worse throw a cleat right through my back - so far I have not read of anyone getting killed by the MRS thing. I'm always fearful of it.
Looks like it's a good time to go into the electronics cabinet above the dinette and clean up your wires and rearrange the foam blocks - (I had to do that a couple weeks ago to add some battery meters). You can get to the bolts that hold the mast base brackets from there.
BWY has all the parts you need - I just got a brand new base plate for my mast because it was a bit bent and the bolt was moving messing up the calibration on my wind sensor compensator (seems like no one makes anything these days that we don't have to mod

) I re did the bolt arrangement - bearings, and plate so I could better control the bolt from spinning - yet another PITA! The weak link on those in mast wind compensators is the bolt they attach to - if the bolt moves - your whole system is out of wack

so I had to make modifications to the wind sensor compensator to accommodate such things (a manual adjuster at the base of the mast I created)

EVERYTHING you buy these days needs to me modified to really work well.
Always good to have spare parts! If I were there I would help you fix it!