Sounds like an interesting project, Jordan. If you want to drill and tap the tops for the correct BA hardware, there is a company just outside of Boston that sells it. If memory serves me today, the cheesehead screw required has a 3/4 inch thread length and one inch is the common size today. I found they trim down just fine and the company in question is great to deal with.
Also, I recall about a year ago, somewhere on the forum, somebody in Australia posting that the stock these bridges are made from is still in production and available in certain lengths from somewhere. It is basically a long slab of the three steel and two rubber sections already bonded together. Cannot find the thread right now, but if still available all you would need is a shop style electric hacksaw to set the stock into to slice off the right sized pieces for drilling and tapping the three appropriate holes.
Now go get some sleep. I'm finally into the tea now.
David
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