I got them off of eBay UK really cheap. The brackets will not be used as I have another plan but the linkages will work perfect. I did contact Omar's but I confused them with what I was looking for and in the end the little metal actuator was going to be $75. LOL. Gimmie a break. I guess they are made of Platinum. I'm just going to weld a $.05 piece of iron to the existing brake pedal spline to make it work. All is good. I'll post pics once I'm done.
If it will help I'll buy the parts you are not using off you....I own a 900F and could use those rearset brackets to make my own. Heck I might even be able to trade you for a set of generic mount tarozzi pegs.
YOu could contact jimhinshaw on ebay - he sells tarozzi rearsets and they have a similar splined brake arm for their cb750 rearsets and see what the part costs for him to get it for you.
welding a tab to you existing brake is going to be the cheapest option. The tooling to make splines is extremely expensive.