roll cage building time, need parts source

[super vw]

Well, a few months back i purchased a complete SCCA legal weld in roll cage (6 point) from Io-Port racing. the cage is made from Kirk racing out of alabama, they produce a whole bunch of cages for all kinds of racing applications. Auto power does not make a SCCA legal one at this time.

Anyways, i have not instaled the setup yet becuase i would like to make some personal changes to the design. the center hoop BTW was bent SUPER tight to the conforms of the beetles body (very nice!). the problem is the door bars i would like to make removable, and to do so i need some sort of removable mounting system. from what i have seen from other builders is the use of a high quality and super burly clevis system.
The question is where can i source a sweet looking, and super strong/tight fitting clevis?

Heugo has made extensive use of this kinda clevis shown in most of there products:
http://www.theboxercollective.com/ga...serialNumber=2
Oh, and since im in the USA... parts found in this country would be nice.

Thanks guys!
Jonathan