I had a part of the locking mechanism fall off my Lee Foundation Kit and it's useless now. My 4x6 filters are also pretty useless without the kit as I don't like to manually hold them.
My normal stores all have it on backorder, so I was wondering if there was a good solution from another brand, or if anyone knew of a vendor that was selling foundation kits.
B&H also normally stocks all the little parts for the filter holder, all though stock status is always a concern with anything from Lee. By checking a fair number of places, you may be able to find the parts you need even if it is generally a hard thing to come up with.
oh yeah the first thing i did when i got my holder years ago was to just put a little dab of glue on the threaded portion of the lock knob to keep it in place.