Have you got a link where these can be sourced?
Electric Vehicle Parts Store | RaleighEV
RaleighEV supplies parts you need for electric vehicle conversions, including Netgain Hyper9 Motors.
www.raleighev.com
They have another block for sale there at a very attractive price relative to other sources such as Gordon electrical supply, however I couldn’t verify the stud distance so I bought the above. My thinking was, in addition to accommodating the Ferraz Shawmut fuse, I could make it fit a class T or any other similarly sized fuse should I want or need to down the road.