Z axis 37mm LONG motor bracket, where to buy from?

i can find short 37mm motor mounts everywhere. but can’t find the longer ones used on the ring and z axis motor mounts?

I had them custom made. You can find the CAD files here: http://maslowcommunitygarden.org/Maslow-Ring-System.html

But we don’t have them for sale right now, hopefully we’ll get them in stock soon-ish