you can get a no frills fitting done at almost any bike shop - not sure what they'll charge you.
But if you want the cadillac of bike fit, you go to Tad hughes:
Tad Hughes Custom Fit Studio | Texas' only independent Master Bike Fitter and retailer of 100% custom footbeds for any lifestyle.
but it'll cost ya...
where in houston are you? (where do you ride/want to ride?)