It was more than 20 years ago that I used a Tektronix 1241 for similar purposes, although my job was to make the software work. It was pretty easy to use because there was a ROM pack that could disassemble the instructions and knew how to interpret each bus cycle. These logic analyzers are frequently seen on ebay, but it is often hard to tell how they are configured (because the sellers don't know how to describe what they have), and they usually do not have any acquisition probes. I doubt that they are getting more reliable with age, either.
I'm sure a newer logic analyzer design could easily acquire the bus data you need, but I have my doubts that a newer machine will have decode information for such an old CPU. That would mean either you would have to decode the data manually or perhaps do extensive "programming" to make it work well.
What is your budget for this equipment?