I have used 3 of the CNCdrive brushed DC drives on my 1983 Shizuoka. They are a well priced product although clearly not in the Yaskawa quality zone.
These are 160Vdc and 45A, which is good for several kW per axis. That works nicely on my machine and enables modern toolpaths and Youtube-level rapids(!). The setup / tuning software was fairly straightforward to use.
I don't know if there is a distributor in the US. They are based in Hungary and they also sell the UCCNC software you may have heard of.
DG4S-16035 DC servo drive - CNCdrive - webshop