I would actually really appreciate
@PST explaining why these spacers aren't available according to the sales people I contacted. Seems really risky to buy them when simply losing or damaging one would result in having to buy a whole kit for almost $500.
I've not received a response here yet so I wanted to offer that it appears these are an off the shelf heim spacers and possibly not manufactured by PST. If that's the case, and I'll admit it's likely, it would have been much more help had the sales team simply said that. If these are specific to PST, the question stands.