72 4x4 Blazer - Pitman Arm Question

[My7d1]

Ok, I have a 72 Blazer, 4x4 and it needs a "new" pitman arm, seems simple enough except the one that is on there is a "clamp" style? I never heard of this type and am having a pretty tough time finding a direct replacement, the usual suspects for such a typical part have all put their palms up and shrugged. Any one on here either have one in good condition or know of a source for a replacement?

Thanks!