Just my opinion not knowing your situation.
CGW will do a superior job. Same great job with The CZ Custom Shop with their upgraded parts.
You can save money by DIY the parts. If you gain the confidence to remove and replace the hammer linkage and the Short Reset Disconnector parts (drive out and replace pins), install the CGW adjustable sear with one small spring or "Fit" your sear to the new hammer (videos here show how to do all), and install a new hammer spring ( 15# or 13#, try both...this is simple to do); then DIY.
If not, then contact and talk to CGW or CZC about what you want, and they can give you a price and approximately how long it will take to do the work.