My Reedy 4200's fit in my B44 perfect and I think they're 23mm tall. if you cross reference the size of the reedy's against yours I'm pretty sure they'll fit no problem. The trackpowers are listed as 2mm shorter in height so you may need a bit of rubber or foam under the battery straps just to hold them still so they don't rattle about.
BRCA list says your trackpowers are 47mm wide and my reedy's are within 1mm the same. length they are within 1mm of eachother. I can't see fitting them a problem at all
Source:
http://www.brca.org/BRCA/elecboard/n...0V12%20pdf.pdf