I keep a look out for these (sumptimes). There is a listing in the USA, selling this suspension seat post similar to the one we reviewed in VV37. It has the same central plunger and linkages design. https://slo.craigslist.org/bop/5579444266.html. They were hard to obtain for a while. The ‘going rate’ for a new one in the UK is around £60 and I see there are a number out there now on the auction sites.