What an unpleasant feeling when I walked into the bike locker. The front wheel and fork were stolen. That $ucks!

I would like to replace it with a non suspension fork for 2 reasons, I only ride on paved surfaces and it's cheaper. Could not find the physical frame spec sizes for my 2010 Trek 7500. I would welcome any suggestions for a rigid fork that does not change the frame/fork geometry of the original setup. I was thinking of a threaded fork (only a thought) because I like the idea of adjusting the height of the bar by loosening 1 bolt. I have that old style handle bar with locking wedge...somewhere. Thanks Much!