In principle, any HPA bottle regulator will do.
However they do come designed for use with either a 3000psi or 4500psi source cylinder - the obvious difference being the burst disk fitted, you have a 4500psi capable cylinder so you should use a regulator designed for 4500psi cylinders
As airsoft gets governed by a subsequent inline regulator you can worry less about the specifications of the cylinder regulator.
The cylinder you have bought is supplied without a regulator as that lets the owner choose their own, which is common in paintball to meet personal needs
(It also means that the seller isn’t posting a pressure vessel)
Here the Cat 5 is designed to accept an input pressure of 300psi to 1000psi:
https://www.wolverineairsoft.com/files/documentation/STORM Category 5 Owner's Manual.pdf
Feed it over 1000psi and things are going to fail, feed it below 300psi, and though the output is 80psi to 180psi you could experience refresh problems
This is a basic 4500psi regulator, with a designed output of 900psi. But take note that even though the Storm could take that, the retailer doesn’t recommend it for most airsofters. (These days most paintballers would avoid such a high pressure) But It is cheap and cheerful
(If you don’t want to spend much more at the moment you could call to check it would be OK
https://shop.super5ives.com/shop/item/113567/standard-bottle-regulator-rated-45k.html
For not much more £ there’s the Dye throttle, though these a typically still high in output around 850psi
https://shop.super5ives.com/shop/item/100493/dye-lt-throttle-regulator-4500psi300bar.html
Put up the budget a bit and you can get regulators designed to be adjusted, not only changing shims for the output pressure but also potentially adjust the position that the fill nipple sits (if using as a bottle on configuration to avoid stabbing wrists)
Check the capabilities as that SHPs default would probaly blow your inline regulator, but the SLP would be the low end pressure for your inline
https://shop.super5ives.com/shop/item/14010/ninja-pro-reg-v2-slp.html
https://shop.super5ives.com/shop/item/12922/ninja-pro-reg-v2-shp.html