You could have sourced the RPM 103mm bb from ProBikeKit, but though the prices are similar, I think the Tange looks of slightly better quality. It appears that you bought the last one.
I won't add a special mention for 103mm BBs. I think Langsters use that fitting, so there will always be several sources to get it from. But if more people ask, then I will certainly consider re-arranging the list, to provide that extra info. Italian-Solutions also had the Sugino 103mm.
You could have sourced the RPM 103mm bb from ProBikeKit, but though the prices are similar, I think the Tange looks of slightly better quality. It appears that you bought the last one.
I won't add a special mention for 103mm BBs. I think Langsters use that fitting, so there will always be several sources to get it from. But if more people ask, then I will certainly consider re-arranging the list, to provide that extra info. Italian-Solutions also had the Sugino 103mm.