Why not make a line between 'cool item' 'sweet item' and 'magic item'?
For example, lets take Parson's armor, the Staff of Suckage, and Eyebooks/the bracer..
Parson did not 'pop' with armor, and hence got some made. This is fabrication, A/B special style. Parson has a +2 to one stat from the armor. Nothing more.
The Staff of Suckage is a 'sweet item', it has a single, passive effect; making it hard(impossible?) for spells to be cast on you. It's just there. I would equate this with what Dollamancers do already in the rules. Slately's jetpack may also count as one of these.
And lastly, things like the Eyebooks or the bracer. These have nothing similar in the rules. They provide not only a passive effect, but an active one too. The Ibooks provide side-wide instant communications, with added features such as diary keeping and stuff. The bracer provides likely not only a minor bonus to combat, but an ability to spend juice to zap dudes. Message hats also likely are found here. Perhaps also golems?
In example 1 and 2, well, we already have rules for these. But in example 3, such objects would likely have their own juice pool. Probably less than a 1st level caster's, but still. Lets say they have 10 juice(subject to debate, and increase/decrease based on spell costs; think of these like custom spells). That means the bracer could unload 10-15(!) points of damage, if I recall correctly. But how does that work for the books? Answer: it doesn't really. The Eyebooks use the special Thinkamancer rule, only instead of part of their juice, it is all of it for all-turn communications.
I would also like to propose that all dollamancer items equal a Special CostxN to create. Where Special Cost is the points(2 for some) and N is the decided juice cost per point. As for magic item creation? Likely a large number of materials and a large amount of juice from all casters required for its disciplines. Please note that despite not having dollamancers GK's three linked casters still managed to make the Eyebooks.
EDIT: TL;DR. Cool Items are non-special fabrications, Sweet Items are made by dollamancers, and Magic Items are made by a casters working together to churn out an item.
As someone will point it out; I do not believe simple mancers should be able to work on magic items. Like was mentioned before; maybe short-lasting bonus objects(simple mancer potions, flowerpower rations, etc.), but not magic items as they are shown above.
Also, feel free to disagree with my ideas. This was spur of the moment. But please, if you do bash em, leave an alternative proposition.
All systems nominal.