Here's their official website to start with, Bob...
http://www.48highlanders.com/index.html
...and the Old Comrades' Association...
http://www3.sympatico.ca/ronkierstead/
One of our members here, Art Johnson, is ex-48th and still heavily involved with the Regiment through its museum and association. I'm sure he'll be able to answer any specific questions you might have, or at least point you in the right direction... so ask away!