Tony, most independent computer stores will custom make any kind of PC you wish. My son has not purchased a PC in 30 years - he built every one of the 20 or so he has owned. You can purchase all the components from a number of online stores, then it's just a matter of plugging them in and installing the software, which is pretty much self installing.
Gary

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PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)