Your going to need to find somebody with a 24+" bandsaw. They're massive and expensive, so it's probably going to be a commerical shop. You might actually see if you can find some manufacturers (Laguana is one company) and see if they would give you the names of customers in the Boston area.

Another alternative might be to find someone with a portable bandsaw, the kind just to mill logs. Woodmizer is one such machine. Again, work backwards from the manufacturer.

After that any decent cabinet or woodworking shop should be able to glue it up into the size you want and smooth the surface.

Actually, a sawmill would probably be easier to find. The Woodmizer is technically a band saw, but operates horizontally, and is called a saw mill. They are portable.

However, it would be easier and less expensive to take the block to the mill.

One way to find sawmills is to simply put 'Boston sawmills' in the Google search box. Or Massachusetts sawmills.

Wood-Mizer used to have a list of owners who would saw-for-hire. That seems to be no more. But here is an alternative.

Here is a link that might be useful: sawmills

Thanks everyone... I went to a local lumberyard/milling company and desccribed the project to them. They could do it IF my block did not have any bungs along the side - which cover up metal ties used to hold the block together. (No one wants to risk hitting one with their saw.) Unfortunately, when I checked it out there are bungs all along both sides. We'll have to repurpose the block as-is.

Suppose you remove the bungs and remove the ties. Then have the mill cut it. If the block comes apart w/o the ties, so much the better, it can then be cut w/o a monster bandsaw, and can be reassembled w/ bolts or glue.