I have been working with a friend who is in the sheet metal industry and we have developed these two brackets. There are two types. One is short and more suited to F1/GP cars(BWA style) and the other has longer arms and is 1.0mm offset. Not to say you couldnt file the bearing holes and give yourself a short offset bracket using type 1. The material is spackle finish panel steel. I can bend it on the fold lines with thumbs and pliers. It also solders well. Costs are 2.00GBP per piece plus shipping. PM me for more details if you wish.
Ok, these brackets have been revised (new finish to the panel steel) and I have added a third one to the line up. Type 1) Short BWA style for ff slimline motors Type 2) longer arms and offset 1mm for ff slimline motors Type 3) Standard no offset for FK motors or FC motors with can end drive and mounting holes eg BWA/NC-1