This depends on how long you need to access this RAID on a PC. If its like permanently, then get a Thunderbolt 3 card for your PC. That may or may not be possible depending on your PC’s motherboard, and your appetite for opening the PC and inserting a card in it.
So the other option is, via a network with a Mac. You could get a mac Mini and a 10GigE or a GigE Ethernet adapter to connect that to your PC over Ethernet. Then you connect to the drive to the Mac Mini, connect the PC and Mac Mini over Ethernet, and share the drive. So the Mac Mini is working like a ‘server’.
Its not absolutely necessary to buy a new Mac. If this is a temporary requirement, then you could borrow one, buy a used one cheap too. It has to have a reasonably capable dual core CPU with even 8GB RAM will do. It can be a MacBook Air too. All you need is an Ethernet adapter for the Mac, assuming that on the PC side you already have a Ethernet port.