Titlist does a fitting day. Look on their web site and you can sign up for a time.
It used to be free but it's a fee now and but you can apply it towards a purchase (I think).
I did one several years ago, guy went thru several club heads, shafts, lofts, lie, etc and found one combo that gave me pretty consistent results. Honestly I was hitting it really well that day, I think I maybe had one shank and maybe a few toppers, but otherwise struck it great so I got good results. Used a Trackman at the time and being an engineer was nice to truly understand all the numbers, angles, etc (not saying anyone else wouldn't but he flat out said "you engineers are good and bad for the exact same reason!) ;0
Club fitting was emailed to me and I ordered them from my local course b/c I got a 10% discount from them. 5-GW I think cost me ~$900. The fitter did not actually sell clubs at that time but I think that's changed as well.