Good to see you found our forum and club. I have built a couple of hardtails over the years, and am currently working on an 883 in a rigid Paughco frame, and about to start fabricating my own hardtail for an XS650. A couple of my other builds are documented in "Complete Rebuilds"; a rigid framed drag bike and a GS650 which I converted to a mono-shock.
Curiously, I have never actually built forward controls, but I have done some fabrication with linkages etc for mid controls. I'm kind of short and prefer mids. In fact, right now on my hoist I have my 883 with homemade brake set up involving linkages and a rocker. You may want to check it out.
You can get linkage parts (clevis and hime (sp?) joints and bronze bushings) at Princess Auto. They're even metric which is cool.
Russel Parker (a.k.a. Rusty Bucket on the forum) has done a number of cafe racers requiring rear sets. He has fabricated all of his own. I am sure he'd be honoured to show you his work.
I will probably be in the shop this weekend or even tonight. I live at 103 Parker Drive (6 blocks north of 1st and Tabor on the corner of Tabor and Parker. If the lights are on in the garage, that usually means I'm in there tinkering with something). Feel free to drop by.
I am also hosting a tech night on Tuesday. See "Tech Nites"
Peace & Grease, Dennis