spindle brace
If you're referring to the aluminum cylinder with a threaded hole on each end, that should fit exactly flush between the sides, no way are you going to bend anything to make that fit. Not sure how that could happen but just call Tsled and they'll sort it out for you. Or post a pic so we can confirm what you're seeing.
You could put washers in there, but why bother cause that's exactly not right either. You could certainly get by with washers till you sort it out because none of the earlier kits even had that spacer anyway.