A quick search doesn't provide a great deal of hope as far as open tools.
Can you post one of the files and any known documentation about the specific contents? Sometimes it is possible to tease stuff out though that may be more time consuming.
You may have a secondary issue with whether you have truly ancient MAC files or a later version.
Or contact the guy at this post: https://globalpragmatica.com/?page_id=93
And see if you think it is 1) legit and 2) within your budget.