[GNC] Share Records When Receivers Appointed

[flywire]

How should shares be recorded in GnuCash once receivers are appointed?

Shares are no longer being traded but the ASX quote feed returns the price
last traded. There seems to be a realistic (management) value and a tax
value. The realistic share value is zero but I understand the tax value is
the purchase cost until the administration process is finalised,
likely many years away.

I expect I might need to reports for both values.