Maedler sells to private people, got a mail! The belts they can’t do, widing the pulleys to 8mm can be done for 11,50€ extra but without a M3 thread because of the left material of 1mm thickness. Maybe I will oder some pulleys only, we will see.
Oh, okay didn’t knew that, as they don’t really got more than a online catalog.
I stumbled upon this beltingonline.com/19-tooth-t2-5-pulley-4879 which u can select the bore and grub-screw holes.
So a 8mm bore and 2 m3 grub-screw holes brings it to 7.17£ which is about 10 euro per pulley at beltingonline.com…
So times 4 is €40 without shipping… Hmmm looks expensive but its all machined perfect i guess…
Can’t maedler machine the pulleys to the requested specifications? And whats the pricing on those then?
Kind regards
JeAfKe
I have ordered 4 pullies from Beltingonline ended up at 46 British Pounds about 620 SEK wish is expensive yes but in this case i dont realy care i just want to save my belts 
I made a special drawing for a specialiced pullie on thingiverse but i havent been able to find anyone around localy that can make them any time soon 
// Marlark
Yeah I’ve also ordered 4 of them for 46£ any tips on installing them?
Could U maybe show us how they look on your setup?
Kind regards
JeAfKe
I have an idea how im going to use them. But atm im waiting for them to be delivered. Ill defenetly post pictures when i have them installed.
// Marlark
Just got a email from beltingonline and my pullies have been shipped today 
09/07/2015 Processing
13/07/2015 Shipped
Yes same here
I picked em up at the post office.
BUT there’s a surprise with them… :-/
The grub screw holes aren’t drilled into the flange… But in the actual pulley itself…
On the other hand… That isn’t that bad (More thread to fixate on), so now we could cut off the flange on the side. So it actually is going to take LESS space on the rod than the original ones only drawback is that its gonna be a little tricky to tighten the screws when it has a belt on it… But I got this screwdriver with a flexible neck where i can put in a allen bits. So for the long belt I just need to tighten it on the side where there’s no contact off the belt. Or i could put it in place and when its aligned correctly tighten the motor driven pulley first. Release the other rod on the opposing side so the belt can be loosened and just tighten the screws when the pulley is against the motor driven one… Tricky tricky…
On the other hand… After 100h hours of printing… My belts don’t grind anymore… I guess by the wear and tear they have enough space now… But I’m gonna swap the pulleys anyway.
So the cause is probably like SlowFoot mentioned, the belts are 6mm of factory, maybe even 6.05 and having a 12mm pulley is just not enough to have them sit next to each other.
Kind Regards